Intel I7-900 DESKTOP PROCESSOR - VOLUME 2 User manual

Document Number: 320835-003
Intel®Core™ i7-900 Desktop
Processor Extreme Edition Series
and Intel®Core™ i7-900 Desktop
Processor Series
Datasheet, Volume 2
October 2009

2Datasheet
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Datasheet 3
Contents
1Introduction............................................................................................................11
1.1 Terminology .....................................................................................................11
1.1.1 Processor Terminology ..........................................................................11
1.2 References ....................................................................................................... 13
2 Register Description ................................................................................................15
2.1 Register Terminology......................................................................................... 15
2.2 Platform Configuration Structure .........................................................................16
2.3 Device Mapping.................................................................................................17
2.4 Detailed Configuration Space Maps ......................................................................18
2.5 PCI Standard Registers ......................................................................................36
2.5.1 VID - Vendor Identification Register ........................................................36
2.5.2 DID - Device Identification Register.........................................................36
2.5.3 RID - Revision Identification Register.......................................................37
2.5.4 CCR - Class Code Register .....................................................................37
2.5.5 HDR - Header Type Register...................................................................38
2.5.6 SID/SVID - Subsystem Identity/Subsystem Vendor
Identification Register ...........................................................................38
2.5.7 PCICMD - Command Register ................................................................. 39
2.5.8 PCISTS - PCI Status Register..................................................................40
2.6 SAD - System Address Decoder Registers............................................................. 41
2.6.1 SAD_PAM0123 .....................................................................................41
2.6.2 SAD_PAM456.......................................................................................43
2.6.3 SAD_HEN ............................................................................................44
2.6.4 SAD_SMRAM........................................................................................44
2.6.5 SAD_PCIEXBAR .................................................................................... 45
2.6.6 SAD_DRAM_RULE_0, SAD_DRAM_RULE_1, SAD_DRAM_RULE_2,
SAD_DRAM_RULE_3
SAD_DRAM_RULE_4, SAD_DRAM_RULE_5
SAD_DRAM_RULE_6, SAD_DRAM_RULE_7 ............................................... 45
2.6.7 SAD_INTERLEAVE_LIST_0, SAD_INTERLEAVE_LIST_1
SAD_INTERLEAVE_LIST_2, SAD_INTERLEAVE_LIST_3
SAD_INTERLEAVE_LIST_4, SAD_INTERLEAVE_LIST_5
SAD_INTERLEAVE_LIST_6, SAD_INTERLEAVE_LIST_7...............................46
2.7 Intel QPI Link Registers...................................................................................... 47
2.7.1 QPI_QPILCL_L0, QPI_QPILCL_L1 ............................................................47
2.8 Integrated Memory Controller Control Registers ....................................................47
2.8.1 MC_CONTROL ...................................................................................... 47
2.8.2 MC_STATUS.........................................................................................49
2.8.3 MC_SMI_SPARE_DIMM_ERROR_STATUS..................................................50
2.8.4 MC_SMI_SPARE_CNTRL.........................................................................51
2.8.5 MC_RESET_CONTROL............................................................................51
2.8.6 MC_CHANNEL_MAPPER..........................................................................52
2.8.7 MC_MAX_DOD...................................................................................... 53
2.8.8 MC_RD_CRDT_INIT...............................................................................54
2.8.9 MC_CRDT_WR_THLD.............................................................................55
2.8.10 MC_SCRUBADDR_LO.............................................................................55
2.8.11 MC_SCRUBADDR_HI .............................................................................56
2.9 TAD – Target Address Decoder Registers.............................................................. 57
2.9.1 TAD_DRAM_RULE_0, TAD_DRAM_RULE_1
TAD_DRAM_RULE_2, TAD_DRAM_RULE_3
TAD_DRAM_RULE_4, TAD_DRAM_RULE_5
TAD_DRAM_RULE_6, TAD_DRAM_RULE_7................................................57

4Datasheet
2.9.2 TAD_INTERLEAVE_LIST_0, TAD_INTERLEAVE_LIST_1
TAD_INTERLEAVE_LIST_2, TAD_INTERLEAVE_LIST_3
TAD_INTERLEAVE_LIST_4, TAD_INTERLEAVE_LIST_5
TAD_INTERLEAVE_LIST_6, TAD_INTERLEAVE_LIST_7................................58
2.10 Integrated Memory Controller Channel Control Registers.........................................59
2.10.1 MC_CHANNEL_0_DIMM_RESET_CMD
MC_CHANNEL_1_DIMM_RESET_CMD
MC_CHANNEL_2_DIMM_RESET_CMD.......................................................59
2.10.2 MC_CHANNEL_0_DIMM_INIT_CMD
MC_CHANNEL_1_DIMM_INIT_CMD
MC_CHANNEL_2_DIMM_INIT_CMD..........................................................60
2.10.3 MC_CHANNEL_0_DIMM_INIT_PARAMS
MC_CHANNEL_1_DIMM_INIT_PARAMS
MC_CHANNEL_2_DIMM_INIT_PARAMS.....................................................61
2.10.4 MC_CHANNEL_0_DIMM_INIT_STATUS
MC_CHANNEL_1_DIMM_INIT_STATUS
MC_CHANNEL_2_DIMM_INIT_STATUS .....................................................62
2.10.5 MC_CHANNEL_0_DDR3CMD
MC_CHANNEL_1_DDR3CMD
MC_CHANNEL_2_DDR3CMD....................................................................63
2.10.6 MC_CHANNEL_0_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_1_REFRESH_THROTTLE_SUPPORT
MC_CHANNEL_2_REFRESH_THROTTLE_SUPPORT......................................64
2.10.7 MC_CHANNEL_0_MRS_VALUE_0_1
MC_CHANNEL_1_MRS_VALUE_0_1
MC_CHANNEL_2_MRS_VALUE_0_1..........................................................64
2.10.8 MC_CHANNEL_0_MRS_VALUE_2
MC_CHANNEL_1_MRS_VALUE_2
MC_CHANNEL_2_MRS_VALUE_2 .............................................................65
2.10.9 MC_CHANNEL_0_RANK_PRESENT
MC_CHANNEL_1_RANK_PRESENT
MC_CHANNEL_2_RANK_PRESENT............................................................65
2.10.10 MC_CHANNEL_0_RANK_TIMING_A
MC_CHANNEL_1_RANK_TIMING_A
MC_CHANNEL_2_RANK_TIMING_A ..........................................................66
2.10.11 MC_CHANNEL_0_RANK_TIMING_B
MC_CHANNEL_1_RANK_TIMING_B
MC_CHANNEL_2_RANK_TIMING_B ..........................................................69
2.10.12 MC_CHANNEL_0_BANK_TIMING
MC_CHANNEL_1_BANK_TIMING
MC_CHANNEL_2_BANK_TIMING..............................................................70
2.10.13 MC_CHANNEL_0_REFRESH_TIMING
MC_CHANNEL_1_REFRESH_TIMING
MC_CHANNEL_2_REFRESH_TIMING.........................................................70
2.10.14 MC_CHANNEL_0_CKE_TIMING MC_CHANNEL_1_CKE_TIMING
MC_CHANNEL_2_CKE_TIMING................................................................71
2.10.15 MC_CHANNEL_0_ZQ_TIMING
MC_CHANNEL_1_ZQ_TIMING
MC_CHANNEL_2_ZQ_TIMING .................................................................71
2.10.16 MC_CHANNEL_0_RCOMP_PARAMS
MC_CHANNEL_1_RCOMP_PARAMS
MC_CHANNEL_2_RCOMP_PARAMS...........................................................72
2.10.17 MC_CHANNEL_0_ODT_PARAMS1
MC_CHANNEL_1_ODT_PARAMS1
MC_CHANNEL_2_ODT_PARAMS1.............................................................72
2.10.18 MC_CHANNEL_0_ODT_PARAMS2
MC_CHANNEL_1_ODT_PARAMS2
MC_CHANNEL_2_ODT_PARAMS2.............................................................73

Datasheet 5
2.10.19 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_RD......................................... 73
2.10.20 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_RD
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_RD......................................... 74
2.10.21 MC_CHANNEL_0_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_0_3_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_0_3_WR........................................ 74
2.10.22 MC_CHANNEL_0_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_1_ODT_MATRIX_RANK_4_7_WR
MC_CHANNEL_2_ODT_MATRIX_RANK_4_7_WR........................................ 74
2.10.23 MC_CHANNEL_0_WAQ_PARAMS
MC_CHANNEL_1_WAQ_PARAMS
MC_CHANNEL_2_WAQ_PARAMS .............................................................75
2.10.24 MC_CHANNEL_0_SCHEDULER_PARAMS
MC_CHANNEL_1_SCHEDULER_PARAMS
MC_CHANNEL_2_SCHEDULER_PARAMS ...................................................76
2.10.25 MC_CHANNEL_0_MAINTENANCE_OPS
MC_CHANNEL_1_MAINTENANCE_OPS
MC_CHANNEL_2_MAINTENANCE_OPS ..................................................... 76
2.10.26 MC_CHANNEL_0_TX_BG_SETTINGS
MC_CHANNEL_1_TX_BG_SETTINGS
MC_CHANNEL_2_TX_BG_SETTINGS........................................................77
2.10.27 MC_CHANNEL_0_RX_BGF_SETTINGS
MC_CHANNEL_1_RX_BGF_SETTINGS
MC_CHANNEL_2_RX_BGF_SETTINGS ......................................................77
2.10.28 MC_CHANNEL_0_EW_BGF_SETTINGS
MC_CHANNEL_1_EW_BGF_SETTINGS
MC_CHANNEL_2_EW_BGF_SETTINGS......................................................78
2.10.29 MC_CHANNEL_0_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_1_EW_BGF_OFFSET_SETTINGS
MC_CHANNEL_2_EW_BGF_OFFSET_SETTINGS .........................................78
2.10.30 MC_CHANNEL_0_ROUND_TRIP_LATENCY
MC_CHANNEL_1_ROUND_TRIP_LATENCY
MC_CHANNEL_2_ROUND_TRIP_LATENCY.................................................78
2.10.31 MC_CHANNEL_0_PAGETABLE_PARAMS1
MC_CHANNEL_1_PAGETABLE_PARAMS1
MC_CHANNEL_2_PAGETABLE_PARAMS1 ..................................................79
2.10.32 MC_CHANNEL_0_PAGETABLE_PARAMS2
MC_CHANNEL_1_PAGETABLE_PARAMS2
MC_CHANNEL_2_PAGETABLE_PARAMS2 ..................................................79
2.10.33 MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH0
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH1
MC_TX_BG_CMD_DATA_RATIO_SETTINGS_CH2.......................................80
2.10.34 MC_TX_BG_CMD_OFFSET_SETTINGS_CH0
MC_TX_BG_CMD_OFFSET_SETTINGS_CH1
MC_TX_BG_CMD_OFFSET_SETTINGS_CH2...............................................80
2.10.35 MC_TX_BG_DATA_OFFSET_SETTINGS_CH0
MC_TX_BG_DATA_OFFSET_SETTINGS_CH1
MC_TX_BG_DATA_OFFSET_SETTINGS_CH2 ............................................. 80
2.10.36 MC_CHANNEL_0_ADDR_MATCH
MC_CHANNEL_1_ADDR_MATCH
MC_CHANNEL_2_ADDR_MATCH..............................................................81
2.10.37 MC_CHANNEL_0_ECC_ERROR_MASK
MC_CHANNEL_1_ECC_ERROR_MASK
MC_CHANNEL_2_ECC_ERROR_MASK.......................................................82
2.10.38 MC_CHANNEL_0_ECC_ERROR_INJECT
MC_CHANNEL_1_ECC_ERROR_INJECT
MC_CHANNEL_2_ECC_ERROR_INJECT.....................................................82

6Datasheet
2.10.39 Error Injection Implementation ...............................................................83
2.11 Integrated Memory Controller Channel Address Registers........................................84
2.11.1 MC_DOD_CH0_0, MC_DOD_CH0_1, MC_DOD_CH0_2 ................................84
2.11.2 MC_DOD_CH1_0, MC_DOD_CH1_1, MC_DOD_CH1_2 ................................85
2.11.3 MC_DOD_CH2_0, MC_DOD_CH2_1, MC_DOD_CH2_2 ................................86
2.11.4 MC_SAG_CH0_0, MC_SAG_CH0_1, MC_SAG_CH0_2
MC_SAG_CH0_3, MC_SAG_CH0_4, MC_SAG_CH0_5
MC_SAG_CH0_6, MC_SAG_CH0_7, MC_SAG_CH1_0
MC_SAG_CH1_1, MC_SAG_CH1_2, MC_SAG_CH1_3
MC_SAG_CH1_4, MC_SAG_CH1_5, MC_SAG_CH1_6
MC_SAG_CH1_7, MC_SAG_CH2_0, MC_SAG_CH2_1
MC_SAG_CH2_2, MC_SAG_CH2_3, MC_SAG_CH2_4
MC_SAG_CH2_5, MC_SAG_CH2_6, MC_SAG_CH2_7..................................87
2.12 Integrated Memory Controller Channel Rank Registers............................................88
2.12.1 MC_RIR_LIMIT_CH0_0, MC_RIR_LIMIT_CH0_1
MC_RIR_LIMIT_CH0_2, MC_RIR_LIMIT_CH0_3
MC_RIR_LIMIT_CH0_4, MC_RIR_LIMIT_CH0_5
MC_RIR_LIMIT_CH0_6, MC_RIR_LIMIT_CH0_7
MC_RIR_LIMIT_CH1_0, MC_RIR_LIMIT_CH1_1
MC_RIR_LIMIT_CH1_2, MC_RIR_LIMIT_CH1_3
MC_RIR_LIMIT_CH1_4, MC_RIR_LIMIT_CH1_5
MC_RIR_LIMIT_CH1_6, MC_RIR_LIMIT_CH1_7
MC_RIR_LIMIT_CH2_0, MC_RIR_LIMIT_CH2_1
MC_RIR_LIMIT_CH2_2, MC_RIR_LIMIT_CH2_3
MC_RIR_LIMIT_CH2_4, MC_RIR_LIMIT_CH2_5
MC_RIR_LIMIT_CH2_6, MC_RIR_LIMIT_CH2_7 .........................................88
2.12.2 MC_RIR_WAY_CH0_0, MC_RIR_WAY_CH0_1
MC_RIR_WAY_CH0_2, MC_RIR_WAY_CH0_3
MC_RIR_WAY_CH0_4, MC_RIR_WAY_CH0_5
MC_RIR_WAY_CH0_6, MC_RIR_WAY_CH0_7
MC_RIR_WAY_CH0_8, MC_RIR_WAY_CH0_9
MC_RIR_WAY_CH0_10, MC_RIR_WAY_CH0_11
MC_RIR_WAY_CH0_12, MC_RIR_WAY_CH0_13
MC_RIR_WAY_CH0_14, MC_RIR_WAY_CH0_15
MC_RIR_WAY_CH0_16, MC_RIR_WAY_CH0_17
MC_RIR_WAY_CH0_18, MC_RIR_WAY_CH0_19
MC_RIR_WAY_CH0_20, MC_RIR_WAY_CH0_21
MC_RIR_WAY_CH0_22, MC_RIR_WAY_CH0_23
MC_RIR_WAY_CH0_24, MC_RIR_WAY_CH0_25
MC_RIR_WAY_CH0_26, MC_RIR_WAY_CH0_27
MC_RIR_WAY_CH0_28, MC_RIR_WAY_CH0_29
MC_RIR_WAY_CH0_30, MC_RIR_WAY_CH0_31.........................................89
2.12.3 MC_RIR_WAY_CH1_0, MC_RIR_WAY_CH1_1
MC_RIR_WAY_CH1_2, MC_RIR_WAY_CH1_3
MC_RIR_WAY_CH1_4, MC_RIR_WAY_CH1_5
MC_RIR_WAY_CH1_6, MC_RIR_WAY_CH1_7
MC_RIR_WAY_CH1_8, MC_RIR_WAY_CH1_9
MC_RIR_WAY_CH1_10, MC_RIR_WAY_CH1_11
MC_RIR_WAY_CH1_12, MC_RIR_WAY_CH1_13
MC_RIR_WAY_CH1_14, MC_RIR_WAY_CH1_15
MC_RIR_WAY_CH1_16, MC_RIR_WAY_CH1_17
MC_RIR_WAY_CH1_18, MC_RIR_WAY_CH1_19
MC_RIR_WAY_CH1_20, MC_RIR_WAY_CH1_21
MC_RIR_WAY_CH1_22, MC_RIR_WAY_CH1_23
MC_RIR_WAY_CH1_24, MC_RIR_WAY_CH1_25
MC_RIR_WAY_CH1_26, MC_RIR_WAY_CH1_27
MC_RIR_WAY_CH1_28, MC_RIR_WAY_CH1_29
MC_RIR_WAY_CH1_30, MC_RIR_WAY_CH1_31.........................................90
2.12.4 MC_RIR_WAY_CH2_0, MC_RIR_WAY_CH2_1
MC_RIR_WAY_CH2_2, MC_RIR_WAY_CH2_3
MC_RIR_WAY_CH2_4, MC_RIR_WAY_CH2_5

Datasheet 7
MC_RIR_WAY_CH2_6, MC_RIR_WAY_CH2_7
MC_RIR_WAY_CH2_8, MC_RIR_WAY_CH2_9
MC_RIR_WAY_CH2_10, MC_RIR_WAY_CH2_11
MC_RIR_WAY_CH2_12, MC_RIR_WAY_CH2_13
MC_RIR_WAY_CH2_14, MC_RIR_WAY_CH2_15
MC_RIR_WAY_CH2_16, MC_RIR_WAY_CH2_17
MC_RIR_WAY_CH2_18, MC_RIR_WAY_CH2_19
MC_RIR_WAY_CH2_20, MC_RIR_WAY_CH2_21
MC_RIR_WAY_CH2_22, MC_RIR_WAY_CH2_23
MC_RIR_WAY_CH2_24, MC_RIR_WAY_CH2_25
MC_RIR_WAY_CH2_26, MC_RIR_WAY_CH2_27
MC_RIR_WAY_CH2_28, MC_RIR_WAY_CH2_29
MC_RIR_WAY_CH2_30, MC_RIR_WAY_CH2_31 ........................................ 91
2.13 Memory Thermal Control.................................................................................... 92
2.13.1 MC_THERMAL_CONTROL0
MC_THERMAL_CONTROL1
MC_THERMAL_CONTROL2......................................................................92
2.13.2 MC_THERMAL_STATUS0
MC_THERMAL_STATUS1
MC_THERMAL_STATUS2 ........................................................................ 92
2.13.3 MC_THERMAL_DEFEATURE0
MC_THERMAL_DEFEATURE1
MC_THERMAL_DEFEATURE2...................................................................93
2.13.4 MC_THERMAL_PARAMS_A0
MC_THERMAL_PARAMS_A1
MC_THERMAL_PARAMS_A2....................................................................93
2.13.5 MC_THERMAL_PARAMS_B0
MC_THERMAL_PARAMS_B1
MC_THERMAL_PARAMS_B2....................................................................94
2.13.6 MC_COOLING_COEF0
MC_COOLING_COEF1
MC_COOLING_COEF2............................................................................ 94
2.13.7 MC_CLOSED_LOOP0
MC_CLOSED_LOOP1
MC_CLOSED_LOOP2 ............................................................................. 95
2.13.8 MC_THROTTLE_OFFSET0
MC_THROTTLE_OFFSET1
MC_THROTTLE_OFFSET2 .......................................................................95
2.13.9 MC_RANK_VIRTUAL_TEMP0
MC_RANK_VIRTUAL_TEMP1
MC_RANK_VIRTUAL_TEMP2 ...................................................................96
2.13.10 MC_DDR_THERM_COMMAND0
MC_DDR_THERM_COMMAND1
MC_DDR_THERM_COMMAND2................................................................96
2.13.11 MC_DDR_THERM_STATUS0
MC_DDR_THERM_STATUS1
MC_DDR_THERM_STATUS2....................................................................97
2.14 Integrated Memory Controller Miscellaneous Registers............................................97
2.14.1 MC_DIMM_CLK_RATIO_STATUS .............................................................97
2.14.2 MC_DIMM_CLK_RATIO ..........................................................................98

8Datasheet
Tables
1-1 References........................................................................................................13
2-1 Functions Specifically Handled by the Processor.....................................................17
2-2 Device 0, Function 0: Generic Non-core Registers ..................................................18
2-3 Device 0, Function 1: System Address Decoder Registers........................................19
2-4 Device 2, Function 0: Intel QPI Link 0 Registers.....................................................20
2-5 Device 2, Function 1: Intel QPI Physical 0 Registers ...............................................21
2-6 Device 3, Function 0: Integrated Memory Controller Registers .................................22
2-7 Device 3, Function 1: Target Address Decoder Registers .........................................23
2-8 Device 4, Function 0: Integrated Memory Controller Channel 0
Control Registers...............................................................................................24
2-9 Device 4, Function 1: Integrated Memory Controller Channel 0
Address Registers..............................................................................................25
2-10 Device 4, Function 2: Integrated Memory Controller Channel 0
Rank Registers ..................................................................................................26
2-11 Device 4, Function 3: Integrated Memory Controller Channel 0
Thermal Control Registers...................................................................................27
2-12 Device 5, Function 0: Integrated Memory Controller Channel 1
Control Registers...............................................................................................28
2-13 Device 5, Function 1: Integrated Memory Controller Channel 1
Address Registers..............................................................................................29
2-14 Device 5, Function 2: Integrated Memory Controller Channel 1
Rank Registers ..................................................................................................30
2-15 Device 5, Function 3: Integrated Memory Controller Channel 1
Thermal Control Registers...................................................................................31
2-16 Device 6, Function 0: Integrated Memory Controller Channel 2
Control Registers...............................................................................................32
2-17 Device 6, Function 1: Integrated Memory Controller Channel 2
Address Registers..............................................................................................33
2-18 Device 6, Function 2: Integrated Memory Controller Channel 2
Rank Registers ..................................................................................................34
2-19 Device 6, Function 3: Integrated Memory Controller Channel 2
Thermal Control Registers...................................................................................35

Datasheet 9
Revision History
Revision
Number Description Date
-001 • Initial release. November 2008
-002 • Updated section 2.2 and Table 2.3. November 2008
-003 • Updated document title and Introduction chapter October 2009

10 Datasheet

Datasheet 11
Introduction
1Introduction
The Intel®Core™ i7-900 desktop processor Extreme Edition series and Intel®Core™
i7-900 desktop processor series are intended for high performance high-end desktop,
Uni-processor (UP) server, and workstation systems. The processor implements key
new technologies:
• Integrated Memory Controller
• Point-to-point link interface based on Intel®QuickPath Interconnect (Intel®QPI).
Reference to this interface may sometimes be abbreviated with Intel QPI
throughout this document.
Note: In this document the Intel®Core™ i7-900 desktop processor Extreme Edition series
and Intel®Core™ i7-900 desktop processor series will be referred to as “the processor.”
This datasheet provides register descriptions for some of the registers located on the
processor.
The processor is optimized for performance with the power efficiencies of a low-power
microarchitecture to enable smaller, quieter systems.
The Intel®Core™ i7-900 desktop processor Extreme Edition series and Intel®Core™
i7-900 desktop processor series are multi-core processors, based on 45 nm process
technology. Processor features vary by component and include up to two Intel
QuickPath Interconnect point to point links capable of up to 6.4 GT/s, up to 8 MB of
shared cache, and an integrated memory controller. The processors support all the
existing Streaming SIMD Extensions 2 (SSE2), Streaming SIMD Extensions 3 (SSE3)
and Streaming SIMD Extensions 4 (SSE4). The processor supports several Advanced
Technologies: Execute Disable Bit, Intel®64 Technology, Enhanced Intel SpeedStep®
Technology, Intel®Virtualization Technology (Intel®VT), Intel®Turbo Boost
Technology, and Hyper-Threading Technology.
1.1 Terminology
A ‘#’ symbol after a signal name refers to an active low signal, indicating a signal is in
the active state when driven to a low level. For example, when RESET# is low, a reset
has been requested.
1.1.1 Processor Terminology
Commonly used terms are explained here for clarification:
•DDR3 — Double Data Rate 3 synchronous dynamic random access memory
(SDRAM) is the name of the new DDR memory standard that is being developed as
the successor to DDR2 SDRAM.
•Enhanced Intel SpeedStep®Technology — Enhanced Intel SpeedStep
Technology allows trade-offs to be made between performance and power
consumption.
•Execute Disable Bit — Execute Disable allows memory to be marked as
executable or non-executable, when combined with a supporting operating system.
If code attempts to run in non-executable memory the processor raises an error to
the operating system. This feature can prevent some classes of viruses or worms
that exploit buffer over run vulnerabilities and can thus help improve the overall

Introduction
12 Datasheet
security of the system. See the Intel Architecture Software Developer's Manual for
more detailed information. Refer to http://developer.intel.com/ for future reference
on up to date nomenclatures.
•Eye Definitions — The eye at any point along the data channel is defined to be the
creation of overlapping of a large number of Unit Interval of the data signal and
timing width measured with respect to the edges of a separate clock signal at any
other point. Each differential signal pair by combining the D+ and D- signals
produces a signal eye.
•1366-land LGA package — The processor is available in a Flip-Chip Land Grid
Array (FC-LGA) package, consisting of the processor die mounted on a land grid
array substrate with an integrated heat spreader (IHS).
•Functional Operation — Refers to the normal operating conditions in which all
processor specifications, including DC, AC, system bus, signal quality, mechanical,
and thermal, are satisfied.
•Integrated Memory Controller (IMC) — A memory controller that is integrated
in the processor silicon.
•Integrated Heat Spreader (IHS) — A component of the processor package used
to enhance the thermal performance of the package. Component thermal solutions
interface with the processor at the IHS surface.
•Intel®64 Architecture — An enhancement to Intel's IA-32 architecture, allowing
the processor to execute operating systems and applications written to take
advantage of Intel 64. Further details on Intel 64 architecture and programming
model can be found at http://developer.intel.com/technology/intel64/.
•Intel®QuickPath Interconnect – A cache-coherent, link-based interconnect
specification for Intel processor, chipset, and I/O bridge components. Sometimes
abbreviated as Intel QPI.
•Intel®QPI — Abbreviation for Intel®QuickPath Interconnect.
•Intel®Virtualization Technology (Intel®VT) — A set of hardware
enhancements to Intel server and client platforms that can improve virtualization
solutions. Intel VT provides a foundation for widely-deployed virtualization
solutions and enables more robust hardware assisted virtualization solutions. More
information can be found at: http://www.intel.com/technology/virtualization/
•Jitter — Any timing variation of a transition edge or edges from the defined Unit
Interval.
•LGA1366 Socket — The processor (in the LGA-1366 package) mates with the
system board through this surface mount, 1366-contact socket.
•Mirror Port - Pads located on the top side of the processor package used to
provide logic analyzer probing access for Intel QPI signal analysis.
•Non-core — The portion of the processor comprising the shared cache, IMC and
Intel QPI Link interface.
•OEM —Original Equipment Manufacturer.
•Storage Conditions — Refers to a non-operational state. The processor may be
installed in a platform, in a tray, or loose. Processors may be sealed in packaging or
exposed to free air. Under these conditions, processor lands should not be
connected to any supply voltages, have any I/Os biased, or receive any clocks.
•Intel®Core™ i7-900 desktop processor Extreme Edition series and Intel®
Core™ i7-900 desktop processor series — The desktop product, including
processor substrate and integrated heat spreader (IHS).

Datasheet 13
Introduction
•Unit Interval (UI) — Signaling convention that is binary and unidirectional. In
this binary signaling, one bit is sent for every edge of the forwarded clock, whether
it be a rising edge or a falling edge. If a number of edges are collected at instances
t1, t2, tn,...., tk then the UI at instance “n” is defined as:
UI n= t n - t n - 1
1.2 References
Material and concepts available in the following documents may be beneficial when
reading this document.
§
Table 1-1. References
Document Location
Intel®Core™ i7-900 Desktop Processor Extreme Edition Series and Intel®
Core™ i7-900 Desktop Processor Series Specification Update http://download.intel.com
/design/processor/specup
dt/320836.pdf
Intel®Core™ i7-900 Desktop Processor Extreme Edition Series and Intel®
Core™ i7-900 Desktop Processor Series Datasheet, Volume 1 http://download.intel.com
/design/processor/datasht
s/320834.pdf
Intel®Core™ i7-900 Desltop Processor Extreme Edition Series and Intel®
Core™ i7-900 Desktop Processor Series and LGA1366 Socket Thermal and
Mechanical Design Guide
http://download.intel.com
/design/processor/designe
x/320837.pdf
Intel®64 and IA-32 Intel®Architecture Software Developer's Manual
• Volume 1: Basic Architecture
• Volume 2A: Instruction Set Reference, A-M
• Volume 2B: Instruction Set Reference, N-Z
• Volume 3A: System Programming Guide, Part 1
• Volume 3B: Systems Programming Guide, Part 2
http://www.intel.com/pro
ducts/processor/manuals/

Introduction
14 Datasheet

Datasheet 15
Register Description
2Register Description
The processor supports PCI configuration space accesses using the mechanism denoted
as Configuration Mechanism in the PCI specification as defined in the PCI Local Bus
Specification, Revision 2.3, as well as the PCI Express* enhanced configuration
mechanism as specified in the PCI Express Base Specification, Revision 1.1. All the
registers are organized by bus, device, function, etc. as defined in the PCI Express Base
Specification, Revision 1.1. All processor registers appear on the PCI bus assigned for
the processor socket. Bus number is derived by the max bus range setting and
processor socket number. All multi-byte numeric fields use “little-endian” ordering (i.e.,
lower addresses contain the least significant parts of the field).
As processor features vary by component, not all of the register descriptions in this
document apply to all processors. This document highlights registers which do not
apply to all processor components. Refer to the particular processor's Specification
Update for a list of features supported.
2.1 Register Terminology
Registers and register bits are assigned one or more of the following attributes. These
attributes define the behavior of register and the bit(s) that are contained with in. All
bits are set to default values by hard reset. Sticky bits retain their states between hard
resets.
i
Term Description
RO Read Only. If a register bit is read only, the hardware sets its state. The bit may be read
by software. Writes to this bit have no effect.
WO Write Only. The register bit is not implemented as a bit. The write causes some hardware
event to take place.
RW Read/Write. A register bit with this attribute can be read and written by software.
RC Read Clear: The bit or bits can be read by software, but the act of reading causes the
value to be cleared.
RCW Read Clear/Write: A register bit with this attribute will get cleared after the read. The
register bit can be written.
RW1C Read/Write 1 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a one must be written to it. Writing a zero will have no effect.
RW0C Read/Write 0 Clear. A register bit with this attribute can be read or cleared by software.
In order to clear this bit, a zero must be written to it. Writing a one will have no effect.
RW1S Read/Write 1 Set: A register bit can be either read or set by software. In order to set
this bit, a one must be written to it. Writing a zero to this bit has no effect. Hardware will
clear this bit.
RW0S Read/Write 0 Set: A register bit can be either read or set by software. In order to set
this bit, a zero must be written to it. Writing a one to this bit has no effect. Hardware will
clear this bit.
RWL Read/Write/Lock. A register bit with this attribute can be read or written by software.
Hardware or a configuration bit can lock the bit and prevent it from being updated.
RWO
Read/Write Once. A register bit with this attribute can be written to only once after
power up. After the first write, the bit becomes read only. This attribute is applied on a bit
by bit basis. For example, if the RWO attribute is applied to a 2 bit field, and only one bit
is written, then the written bit cannot be rewritten (unless reset). The unwritten bit, of the
field, may still be written once. This is special case of RWL.
RRW Read/Restricted Write. This bit can be read and written by software. However, only
supported values will be written. Writes of non supported values will have no effect.
LLock. A register bit with this attribute becomes Read Only after a lock bit is set.

Register Description
16 Datasheet
2.2 Platform Configuration Structure
The processor contains 6 PCI devices within a single physical component. The
configuration registers for these devices are mapped as devices residing on the PCI bus
assigned for the processor socket. Bus number is derived by the max bus range setting
and processor socket number.
•Device 0: Generic processor non-core. Device 0, Function 0 contains the generic
non-core configuration registers for the processor and resides at DID (Device ID) of
2C41h. Device 0, Function 1 contains the System Address Decode registers and
resides at DID of 2C01h.
•Device 2: Intel QPI. Device 2, Function 0 contains the Intel®QuickPath
Interconnect configuration registers for Intel QPI Link 0 and resides at DID of
2C10h. Device 2, Function 1 contains the physical layer registers for Intel QPI Link
0 and resides at DID of 2C11h.
•Device 3: Integrated Memory Controller. Device 3, Function 0 contains the general
registers for the Integrated Memory Controller and resides at DID of 2C18h. Device
3, Function 1 contains the Target Address Decode registers for the Integrated
Memory Controller and resides at DID of 2C19h. Device 3, Function 2 contains the
RAS registers for the Integrated Memory Controller and resides at DID of 2C1Ah.
Device 3, Function 4 contains the test registers for the Integrated Memory
Controller and resides at DID of 2C1Ch. Function 2 only applies to processors
supporting registered DIMMs.
•Device 4: Integrated Memory Controller Channel 0. Device 4, Function 0 contains
the control registers for Integrated Memory Controller Channel 0 and resides at
DID of 2C20h. Device 4, Function 1 contains the address registers for Integrated
Memory Controller Channel 0 and resides at DID of 2C21h. Device 4, Function 2
contains the rank registers for Integrated Memory Controller Channel 0 and resides
RSVD Reserved Bit. This bit is reserved for future expansion and must not be written. The PCI
Local Bus Specification, Revision 2.2 requires that reserved bits must be preserved. Any
software that modifies a register that contains a reserved bit is responsible for reading the
register, modifying the desired bits, and writing back the result.
Reserved Bits
Some of the processor registers described in this section contain reserved bits. These bits
are labeled “Reserved”. Software must deal correctly with fields that are reserved. On
reads, software must use appropriate masks to extract the defined bits and not rely on
reserved bits being any particular value. On writes, software must ensure that the values
of reserved bit positions are preserved. That is, the values of reserved bit positions must
first be read, merged with the new values for other bit positions and then written back.
Note that software does not need to perform a read-merge-write operation for the
Configuration Address (CONFIG_ADDRESS) register.
Reserved
Registers
In addition to reserved bits within a register, the processor contains address locations in
the configuration space that are marked either “Reserved” or “Intel Reserved”. The
processor responds to accesses to “Reserved” address locations by completing the host
cycle. When a “Reserved” register location is read, a zero value is returned. (“Reserved”
registers can be 8, 16, or 32 bits in size). Writes to “Reserved” registers have no effect on
the processor. Registers that are marked as “Intel Reserved” must not be modified by
system software. Writes to “Intel Reserved” registers may cause system failure. Reads to
“Intel Reserved” registers may return a non-zero value.
Default Value
upon a Reset
Upon a reset, the processor sets all of its internal configuration registers to predetermined
default states. Some register values at reset are determined by external strapping
options. The default state represents the minimum functionality feature set required to
successfully bring up the system. Hence, it does not represent the optimal system
configuration. It is the responsibility of the system initialization software (usually BIOS) to
properly determine the DRAM configurations, operating parameters and optional system
features that are applicable, and to program the processor registers accordingly.
“ST” appended
to the end of a
bit name
The bit is “sticky” or unchanged by a hard reset. These bits can only be cleared by a
PWRGOOD reset.
Term Description

Datasheet 17
Register Description
at DID of 2C22h. Device 4, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 0 and resides at DID of 2C23h.
•Device 5: Integrated Memory Controller Channel 1. Device 5, Function 0 contains
the control registers for Integrated Memory Controller Channel 1 and resides at
DID of 2C28h. Device 5, Function 1 contains the address registers for Integrated
Memory Controller Channel 1 and resides at DID of 2C29h. Device 5, Function 2
contains the rank registers for Integrated Memory Controller Channel 1 and resides
at DID of 2C2Ah. Device 5, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 1 and resides at DID of 2C2Bh.
•Device 6: Integrated Memory Controller Channel 2. Device 6, Function 0 contains
the control registers for Integrated Memory Controller Channel 2 and resides at
DID of 2C30h. Device 6, Function 1 contains the address registers for Integrated
Memory Controller Channel 2 and resides at DID of 2C31h. Device 6, Function 2
contains the rank registers for Integrated Memory Controller Channel 2 and resides
at DID of 2C32h. Device 6, Function 3 contains the thermal control registers for
Integrated Memory Controller Channel 2 and resides at DID of 2C33h.
2.3 Device Mapping
Each component in the processor is uniquely identified by a PCI bus address consisting
of Bus Number, Device Number, and Function Number. Device configuration is based on
the PCI Type 0 configuration conventions. All processor registers appear on the PCI bus
assigned for the processor socket. Bus number is derived by the max bus range setting
and processor socket number.
Notes:
1. Applies only to processors supporting sparing, mirroring, and scrubbing RAS features.
Table 2-1. Functions Specifically Handled by the Processor
Component Register Group DID Device Function
Processor
Intel QuickPath Architecture Generic Non-core Registers 2C41h 00
Intel QuickPath Architecture System Address Decoder 2C01h 1
Intel QPI Link 0 2C10h 20
Intel QPI Physical 0 2C11 1
Integrated Memory Controller Registers 2C18h
3
0
Integrated Memory Controller Target Address Decoder 2C19h 1
Integrated Memory Controller RAS Registers 2C1Ah 21
Integrated Memory Controller Test Registers 2C1Ch 4
Integrated Memory Controller Channel 0 Control 2C20h
4
0
Integrated Memory Controller Channel 0 Address 2C21h 1
Integrated Memory Controller Channel 0 Rank 2C22h 2
Integrated Memory Controller Channel 0 Thermal Control 2C23h 3
Integrated Memory Controller Channel 1 Control 2C28h
5
0
Integrated Memory Controller Channel 1 Address 2C29h 1
Integrated Memory Controller Channel 1 Rank 2C2Ah 2
Integrated Memory Controller Channel 1 Thermal Control 2C2Bh 3
Integrated Memory Controller Channel 2 Control 2C30h
6
0
Integrated Memory Controller Channel 2 Address 2C31h 1
Integrated Memory Controller Channel 2 Rank 2C32h 2
Integrated Memory Controller Channel 2 Thermal Control 2C33h 3

Register Description
18 Datasheet
2.4 Detailed Configuration Space Maps
Table 2-2. Device 0, Function 0: Generic Non-core Registers
DID VID 00h 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
48h C8h
4Ch CCh
50h D0h
54h D4h
58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh

Datasheet 19
Register Description
Table 2-3. Device 0, Function 1: System Address Decoder Registers
DID VID 00h SAD_DRAM_RULE_0 80h
PCISTS PCICMD 04h SAD_DRAM_RULE_1 84h
CCR RID 08h SAD_DRAM_RULE_2 88h
HDR 0Ch SAD_DRAM_RULE_3 8Ch
10h SAD_DRAM_RULE_4 90h
14h SAD_DRAM_RULE_5 94h
18h SAD_DRAM_RULE_6 98h
1Ch SAD_DRAM_RULE_7 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
SAD_PAM0123 40h SAD_INTERLEAVE_LIST_0 C0h
SAD_PAM456 44h SAD_INTERLEAVE_LIST_1 C4h
SAD_HEN 48h SAD_INTERLEAVE_LIST_2 C8h
SAD_SMRAM 4Ch SAD_INTERLEAVE_LIST_3 CCh
SAD_PCIEXBAR 50h SAD_INTERLEAVE_LIST_4 D0h
54h SAD_INTERLEAVE_LIST_5 D4h
58h SAD_INTERLEAVE_LIST_6 D8h
5Ch SAD_INTERLEAVE_LIST_7 DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh

Register Description
20 Datasheet
Table 2-4. Device 2, Function 0: Intel QPI Link 0 Registers
DID VID 00h 80h
PCISTS PCICMD 04h 84h
CCR RID 08h 88h
HDR 0Ch 8Ch
10h 90h
14h 94h
18h 98h
1Ch 9Ch
20h A0h
24h A4h
28h A8h
SID SVID 2Ch ACh
30h B0h
34h B4h
38h B8h
3Ch BCh
40h C0h
44h C4h
QPI_QPILCL_L0 48h C8h
4Ch CCh
50h D0h
54h D4h
58h D8h
5Ch DCh
60h E0h
64h E4h
68h E8h
6Ch ECh
70h F0h
74h F4h
78h F8h
7Ch FCh