Dell PowerEdge M620 Quick start guide

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December 2012 | Version 3.0

Table of contents
1 System overview..................................................................................................................................................................5
Introduction.........................................................................................................................................................................5
New technologies ............................................................................................................................................................. 6
2 System features ...................................................................................................................................................................7
Comparison of PowerEdge systems ...............................................................................................................................7
Specifications ..................................................................................................................................................................... 8
3 Module views and features............................................................................................................................................. 10
Module views.................................................................................................................................................................... 10
Module features ................................................................................................................................................................12
4 Processors ..........................................................................................................................................................................14
Processor features............................................................................................................................................................14
Supported processors......................................................................................................................................................15
Chipset................................................................................................................................................................................15
5 Memory...............................................................................................................................................................................16
Supported memory ..........................................................................................................................................................16
Memory configurations ...................................................................................................................................................17
Memory speed ..................................................................................................................................................................18
Memory RAS features.......................................................................................................................................................19
6 Storage ................................................................................................................................................................................21
Internal storage .................................................................................................................................................................21
Storage controllers.......................................................................................................................................................... 22
7 Networking and mezzanine cards ................................................................................................................................ 24
Select Network Adapters................................................................................................................................................ 24
Mezzanine cards .............................................................................................................................................................. 26
8 Power, thermal, and acoustics ...................................................................................................................................... 27
Power consumption and energy efficiency................................................................................................................ 27
Power supply units .......................................................................................................................................................... 28
Thermal and acoustics.................................................................................................................................................... 28
9 Operating systems and virtualization ........................................................................................................................... 30
Supported operating systems........................................................................................................................................ 30
Supported virtualization ..................................................................................................................................................31
10 Dell OpenManage systems management.................................................................................................................... 32
Systems management solutions ................................................................................................................................... 32
OpenManage systems management ........................................................................................................................... 33
Dell server management operations............................................................................................................................ 38
Appendix A. Additional specifications..........................................................................................................................40
Module dimensions and weight....................................................................................................................................40
Video specifications ........................................................................................................................................................40
Environmental specifications .........................................................................................................................................41
USB peripherals................................................................................................................................................................ 42
Appendix B. Standards compliance ............................................................................................................................. 43
Appendix C. Additional resources.................................................................................................................................44
Appendix D. System board block diagram..................................................................................................................46

Table 1. New technologies ................................................................................................................................................ 6
Table 2. Comparing the PowerEdge M610, M710HD, and M620................................................................................7
Table 3. Technical specifications...................................................................................................................................... 8
Table 4. Module features...................................................................................................................................................12
Table 5. Supported processors ........................................................................................................................................15
Table 6. Memory technologies supported.....................................................................................................................16
Table 7. DIMMs supported................................................................................................................................................17
Table 8. Memory speed capabilities ................................................................................................................................19
Table 9. Memory RAS features .........................................................................................................................................19
Table 10. Hard-drive backplane options ..........................................................................................................................21
Table 11. Supported hard drives ........................................................................................................................................21
Table 12. RAID controller feature support ...................................................................................................................... 22
Table 13. Supported Select Network Adapter options and features .......................................................................... 25
Table 14. Supported mezzanine cards............................................................................................................................. 26
Table 15. Power tools and technologies ......................................................................................................................... 27
Table 16. M620 acoustical performance......................................................................................................................... 29
Table 17. Primary operating system support .................................................................................................................. 30
Table 18. Virtual guest operating system support ..........................................................................................................31
Table 19. Virtualization support .........................................................................................................................................31
Table 20. iDRAC7 with Lifecycle Controller functions and benefits........................................................................... 33
Table 21. Feature comparison for iDRAC7 Enterprise and iDRAC7 Express for Blades .......................................... 34
Table 22. One-to-one and one-to-many operations .................................................................................................. 39
Table 23. Supported video modes....................................................................................................................................40
Table 24. Environmental specifications ............................................................................................................................41
Table 25. Industry standard documents .......................................................................................................................... 43
Table 26. Additional resources ..........................................................................................................................................44
Figure 1. M620 front view ................................................................................................................................................. 10
Figure 2. M1000e chassis enclosure with M620 blades ............................................................................................... 11
Figure 3. M620 internal module view............................................................................................................................... 11
Figure 4. QRL code located on module ..........................................................................................................................13
Figure 5. Blade network daughter card (NDC) .............................................................................................................. 24
Figure 6. Dell systems management solutions.............................................................................................................. 32
Figure 7. Systems management server lifecycle ........................................................................................................... 38
Figure 8. Module dimensions............................................................................................................................................40
Figure 9. M620 system board block diagram ................................................................................................................46

Designed for your taxing workloads, such as email, database and virtual environments, the Dell™
PowerEdge™M620 blade server is an ideal blend of density, performance, efficiency and scalability.
The M620 delivers unprecedented memory density and superb performance with no compromise
on enterprise-class features.
Bring impressive new capabilities to your data center with the PowerEdge M620, which offers a
memory capacity of up to 768GB of RAM (using 32GB DIMMs) along with scalable I/O capabilities.
Powered by Intel®Xeon®E5 processors and Dell’s unique Select Network Adapter, our flexible NIC
technology, the M620 provides the performance you require and allows you to allocate your
network throughput to match your application needs.
Your virtualization environments demand high memory capacity in order to maximize the number of
virtual machines per server, and the PowerEdge M620 was designed with this in mind. If you are
running high-performance computing (HPC) application clusters, the M620 provides you with
outstanding computational density and powerful processing capability in a compact form factor.
Help manage your servers using the Dell OpenManage™ portfolio, including Dell’s exclusive
Integrated Dell Remote Access Controller 7 (iDRAC7) with Lifecycle Controller. iDRAC7, an
embedded systems management feature, allows Dell servers to be managed in physical, virtual, local
and remote environments, either in-band or out-of-band and with or without a systems
management software agent. OpenManage also integrates and connects to leading third-party
systems management solutions you may already use, allowing you to maintain a single point of
control and capitalize on your existing investment. OpenManage simplifies the lifecycle of deploying,
updating, monitoring and maintaining your Dell PowerEdge servers.
Implement the right combination of features and performance scalability with the PowerEdge
M-series blade servers, which can handle tough workloads in a data center of any size. In addition to
the world-class management features provided in all PowerEdge servers, the M620 also takes
advantage of the capabilities of the Dell PowerEdge M1000e chassis management controller (CMC).
The CMC allows M-series blades to be managed individually or as groups, in single or multiple
chassis, and within a data center or in multiple geographically dispersed locations around the globe
without requiring a single agent or additional hardware. PowerEdge M-series blade servers use the
redundant power, cooling, and networking infrastructure provided by the M1000e blade enclosure,
which is exceptionally easy to deploy and manage and maximizes power and cooling efficiency.

A number of new technologies are featured on the PowerEdge M620 system, as shown in Table 1.
New technologies
Detailed descriptions
Intel Xeon processor
E5-2600 product family
This new family of Intel processors has embedded PCI Express®(PCIe) lanes for
improved I/O performance and additional new features. See the Processors
section for details.
Intel C600 series chipset
The Intel Platform Controller Hub (PCH) chip is implemented on the M620.
LRDIMM
This new memory option, load reduced DIMM (LRDIMM), is designed with a buffer
chip (or chips) to replace the register to help minimize loading. LRDIMMs can
increase overall server system memory capacity and speed. See the Memory
section for more information.
Flexible LOM
Dell’s Select Network Adapter options allow you choose the right network fabric
without using up a valuable mezzanine card slot. See the Networking and
mezzanine cards section for details.
Next-generation PERC
options
The M620 supports new Dell PERC controller cards with improved functionality
and faster performance. See the Storage section for details.
PERC S110 software
RAID solution
This new software RAID solution supports RAID 0 and 1. See the Storage section
for details.
Express Flash drives
Dell Express Flash PCIe SSDs provide fast performance without requiring
processor resources or capturing DRAM. The M620 supports up to two Express
Flash PCIe SSDs. See the Storage section for details.
iDRAC7 with Lifecycle
Controller
The new embedded system management solution for Dell servers features
hardware and firmware inventory and alerting, in-depth memory alerting, faster
performance, a dedicated gigabit port and many more features. See the Systems
management section for details.
Advanced power
management
The M620 supports advanced power monitoring and power capping tools that can
help manage power consumption in the data center.
Failsafe hypervisors
The internal dual SD module enables Dell's unique Failsafe Virtualization
architecture, ensuring uptime by providing failover capability for embedded
hypervisors, such as VMware®vSphere®ESXi™.
Fresh Air cooling
Dell has tested and validated an integrated data center solution that enables you to
operate at higher temperatures or even chiller-less. See the Power, thermal, and
acoustics section for details.

Compared to the previous generation of Dell PowerEdge blade servers, the M620 has more memory,
processor cores, and networking options than ever before. Features include DDR3 memory, PCI
Express 3.0, a network daughter card (NDC), dual internal SD module, and Dell’s
next-generation iDRAC solution known as iDRAC7 Enterprise with Lifecycle Controller.
The PowerEdge M620 is a replacement for the predecessor M610 and M710HD systems, three
systems that are compared in Table 2. For the latest information on supported features, visit
Dell.com.
Feature
PowerEdge M610
PowerEdge M710HD
PowerEdge M620
Chassis; enclosure
Half-height blade;
PowerEdge M1000e Blade
Enclosure
Half-height blade;
PowerEdge M1000e Blade
Enclosure
Half-height blade;
PowerEdge M1000e Blade
Enclosure
Processors
Intel Xeon processors 5500
and 5600 series
Intel Xeon processors
5500 and 5600 series
Intel Xeon processor
E5-2600 product family
Internal
interconnect
Intel QuickPath Interconnect
Intel QuickPath Interconnect
Intel QuickPath Interconnect
Memory
12 x DDR3 RDIMM and
UDIMM
18 x DDR3 RDIMM and
UDIMM
24 x DDR3 RDIMM, UDIMM,
and LRDIMM
Hard drive bays
(hot plug)
2 x 2.5”
2 x 2.5”
2 x 2.5”
Express Flash drives
Not supported
Not supported
Up to 2
I/O slots
2 PCIe 2.0 x8 mezzanine
card slots
2 PCIe 2.0 x8 mezzanine
card slots
2 x PCIe 3.0 x8 mezzanine
card slots
Optional SD port
Yes
Yes
Yes (redundant hypervisor +
vFlash media)
Dell OpenManage
Systems
Management
Dell OpenManage
Dell Management Console
Lifecycle Controller 1.x
iDRAC6 (Express or
Enterprise) with Lifecycle
Controller 1.x, Chassis
Management Controller
(CMC) 3.x
Dell OpenManage
Dell Management Console
Lifecycle Controller 1.x
iDRAC6 (Express or
Enterprise) with Lifecycle
Controller 1.x, Chassis
Management Controller
(CMC) 3.x
OpenManage Essentials
Dell Management Console
IT Assistant
OMSA Agent
OpenManage Power Center
(requires iDRAC7 Enterprise with
Lifecycle Controller)
Chassis Management Controller
4.x (available with the M1000e
Modular Blade Enclosure)
OpenManage Integrations and
Connections
iDRAC7 Express for Blades with
Lifecycle Controller (standard
option)

Table 3 lists the technical specifications for the PowerEdge M620 blade server. For the latest
information on supported features, visit Dell.com.
Feature
Technical specification
Form factor; enclosure
Half-height blade;
Dell PowerEdge M1000e Blade Enclosure
Processors
Intel Xeon processor E5-2600 product family
Internal interconnect
Intel QuickPath Interconnect (QPI): 6.4GT/s, 7.2GT/s, 8.0GT/s
Cache
2.5MB per core; core options: 2, 4, 6, 8
Memory1
Up to 768GB (24 DIMM slots): 2GB/4GB/8GB/16GB/32GB DDR3 up to 1600MT/s
Chipset
Intel C600
Video
Integrated Matrox®G200
Primary storage
Hot-plug hard drive options:
Up to two 2.5” Express Flash PCIe SSD, SATA HDD/SSD, or SAS HDD/SSD
External storage:
For information about Dell external storage options, visit Dell.com/Storage
USB ports
2 front, 1 internal
I/O mezzanine card
options
1Gb/10Gb adapters:
Broadcom®5719 Serdes 4P 1Gb
Intel I350 Serdes 4P 1Gb
Broadcom 57810S-k 2P 10Gb
Intel X520-x/k 2P 10Gb
Qlogic® QME8262-k 2P 10Gb
Brocade® BR1741M-k 2P 10Gb
Fibre Channel:
QLogic QME2662 2P 16Gb
Emulex®LPm16002B-D 2P 16Gb
QLogic QME2572 2P 8Gb
Emulex LPe1205-M 2P 8Gb
InfiniBand™:
Mellanox®ConnectX®-3 Dual Port FDR10 40 Gb
Mellanox ConnectX-3 Dual Port QDR 40Gb
Mellanox ConnectX-3 Dual Port FDR 56Gb
I/O slots
Fully populated mezzanine card slots and switch modules yield 3 redundant I/O
fabrics per blade.
Dell Select Network
Adapter (network
daughter card)
2 x 10GbE Broadcom 57810S-k
2 x 10GbE Intel X520-k
2 x 10GbE QLogic QMD8262-k
RAID controller
Internal controllers:
PERC S110 (software RAID)
PERC H310
PERC H710
PERC H710P

Feature
Technical specification
Power supplies and
fans
Supplied by M1000e blade enclosure
Dell OpenManage
Systems Management
(Agent-free or with
OpenManage Server
Administrator [OMSA]
Agent)
OpenManage Essentials
Dell Management Console
IT Assistant
OMSA Agent
OpenManage Power Center (requires iDRAC7 Enterprise with Lifecycle
Controller)
Chassis Management Controller 4.x (available with the M1000e Modular Blade
Enclosure)
OpenManage Integrations and Connections:
-OpenManage Integration Suite for Microsoft®System Center
-Dell Management Plug-in for VMware®vCenter™
-Connections for HP®Operations Manager, IBM®Tivoli®Netcool®and CA
Network and Systems Management
iDRAC7 Express for Blades with Lifecycle Controller (standard option)
-Upgrade to iDRAC7 Enterprise with Lifecycle Controller
-Upgrade to 8GB vFlash media or 16GB vFlash media for iDRAC7 Enterprise
with Lifecycle Controller
-Trial evaluation available for IDRAC7 Enterprise with Lifecycle Controller
Operating systems
Microsoft Windows Server®2012
Microsoft Windows Server 2008 R2 SP1, x64 (includes Hyper-V®v2)
Novell®SUSE®Linux Enterprise Server
Red Hat®Enterprise Linux®
Virtualization options:
Citrix®XenServer®
VMware vSphere including ESX™and ESXi
Red Hat Enterprise Virtualization®
For more information on the specific versions and additions, visit
Dell.com/OSsupport.
Embedded hypervisor
Two internal SD cards dedicated for hypervisor
One dedicated for vFlash media support
For more information about the Dell blade solution, see the PowerEdge M1000e Technical Guide or the
M1000e Blade Chassis Specification Sheet on Dell.com.
1GB means 1 billion bytes and TB equals 1 trillion bytes; actual capacity varies with preloaded material and operating
environment and will be less

The Dell PowerEdge M620 implements a new module design that supports up to 24 DIMMS and two
processors. The M620 is a half-height blade server that requires a PowerEdge M1000e chassis to
operate. It occupies one slot vertically in the M1000e for a maximum of 16 blade servers in one
M1000e chassis. The M620 can be mixed with other existing Dell blades of half-height and
full-height form factors.
The M620 is available in two module designs with different heat sinks and maximum number of
supported DIMM slots, including the following:
57mm heatsink: for 95W and under processors and maximum RAM expandability (up to
24 DIMMs)
77mm heatsink: for 115W and 130W processors and RAM expandability up to 20 DIMMs
97mm heatsink: for Fresh Air configurations supporting 95W and under processors and up to 16
DIMMs
The following sections provide external and internal views of the system and describe the module
features. For more detailed information on features and descriptions for the M620, see the Dell
PowerEdge M620 Systems Owner's Manual on Support.Dell.com/Manuals.
As shown in Figure 1, the M620 module supports up to two front-accessible, hot-plug hard drives
and two USB ports.

The chassis design of the M620 is optimized for easy access to components and for airflow for
effective and efficient cooling. Figure 2 shows the M1000e chassis enclosure populated with M620
modules.
The M620 module shown in Figure 3 supports up to 24 DIMMS, two processors, and many other
features that are described in this guide.
For additional system views, see the Dell M620 Systems Owner’s Manual on
Support.Dell.com/Manuals.

Table 4 lists the modules features for the M620 system. For additional information on these features,
see the Dell PowerEdge M620 Systems Owner’s Manual on Support.Dell.com/Manuals.
Feature
Description
Two front-accessible USB connectors
Indicator for M620 power status
Two front-accessible, hot-plug, 2.5-inch drives; see the Storage
section for details
Hard drive activity LEDs
Indicate the status and activity
Release button on the front handle of the blade server
Internal USB connector for a USB flash memory key that can be used
as a boot device, security key, or mass storage device
Trusted Platform Module (TPM)
TPM is used to generate/store keys, protect/authenticate passwords,
and create/store digital certificates; it also supports the Intel®Xeon®
TXT functionality
Quick Resource Locator (QRL)
This code on the chassis can be scanned by a smartphone
application to access additional information and resources for the
server, including videos, reference materials, service tag information,
and Dell contact information
The M1000e chassis enclosure LCD control panel is located on the front of the M1000e chassis to
provide user access to buttons, display, and I/O interfaces. For more information on the M1000e
LCD control panel, see the Dell PowerEdge Modular Systems Hardware Owner's Manual on
Support.Dell.com/Manuals.
A useful feature included with Dell PowerEdge 12th generation servers is the Quick Resource Locator
(QRL)—a model-specific Quick Response (QR) code that is located on the server (see Figure 4). Use
your smartphone to access the Dell QRL application to learn more about the server.

This QRL code allows you to:
View step-by-step videos, including overviews of system internals and externals, as well as
detailed, concise, task-oriented videos and installation wizards
Locate reference materials, including searchable owner’s manual content, LCD diagnostics, and
an electrical overview
Look up your service tag so you can quickly gain access to your specific hardware configuration
info and warranty information
Contact Dell directly (by link) to get in touch with technical support and sales teams and provide
feedback to Dell
These codes provide an easy way to retrieve the critical support information you need when you
need it, making you more efficient and effective in managing your hardware.
For more information on the M1000e chassis enclosure features, see the Dell PowerEdge Modular
Systems Hardware Owner's Manual on Support.Dell.com/Manuals.

The Dell PowerEdge M620 features the Intel Xeon processor E5-2600 product family, offering an
ideal combination of performance, power efficiency, and cost. These processors provide high
performance no matter what your constraint is—floor space, power, or budget—and on workloads
that range from the most complicated scientific exploration to crucial web-serving and
infrastructure applications. In addition to providing raw performance gains, improved I/O is also
made possible with Intel Integrated I/O, which can reduce latency by adding more lanes and
doubling bandwidth. This helps to reduce network and storage bottlenecks, unleashing the
processor’s performance capabilities.
The new Intel Xeon processor E5-2600 product family not only adds new features, but also
improves upon many features of the predecessor Intel Xeon processor 5600 series. A summary of
what’s new and improved includes the following:
Up to two additional cores and up to 8 MB more last level cache
More memory—six more DIMMs than previous-generation of half-height blade servers with
support for up to 32GB DIMMs, increasing memory capacity from 192GB (M610) or 288GB
(M710HD) to 768GB (M620)
Intel Integrated I/O has support for up to 80 lanes of PCIe 3.0, which can reduce latency
Faster connections are provided throughout the system with support for DDR3 1600 MT/s
memory and 8.0 GT/s QPI
Intel DDIO allows I/O traffic to skip the main system memory and be directed straight to the
processor cache, which can provide a significant reduction in latency as well as allowing
memory to remain in a low-power state
Intel Advanced Vector Extensions offer up to double the floating point operations per clock
cycle by doubling the length of registers, which can be useful for addressing very complex
problems or dealing with large-number calculations that are integral to many technical, financial,
and scientific computing problems
Intel Turbo Boost Technology 2.0 delivers up to double the boost than the
previous-generation turbo technology
Continued improvements to both Intel TXT and AES-NI help to better protect systems and data
For more information on the Intel Xeon processor E5-2600 product family, visit Intel.com.

The M620 supports up to two processors with up to eight cores per processor. Table 5 lists the Intel
Xeon processors supported by the PowerEdge M620. For the latest information on supported
processors, visit Dell.com.
Model
Speed
Cache
QPI
Cores
Turbo
TDP
E5-2680
2.7Ghz
20M
8.0 GT/s
8
Yes
130W
E5-2670
2.6GHz
20M
8.0GT/s
8
Yes
115W
E5-2667
2.9GHz
15M
8.0GT/s
6
Yes
130W
E5-2665
2.4GHz
20M
8.0GT/s
8
Yes
115W
E5-2660
2.2GHz
20M
8.0GT/s
8
Yes
95W
E5-2650L
1.8GHz
20M
8.0GT/s
8
Yes
70W
E5-2650
2.0GHz
20M
8.0GT/s
8
Yes
95W
E5-2640
2.5GHz
15M
7.2GT/s
6
Yes
95W
E5-2637
3.0GHz
5M
6.4GT/s
2
Yes
80W
E5-2630
2.3GHz
15M
7.2GT/s
6
Yes
95W
E5-2630L
2.0GHz
15M
7.2GT/s
6
Yes
60W
E5-2620
2.0GHz
15M
7.2GT/s
6
Yes
95W
E5-2609
2.4GHz
10M
6.4GT/s
4
No
80W
E5-2603
1.8GHz
10M
6.4GT/s
4
No
80W
For information on processor installation and configuration, see the Dell PowerEdge M620 Systems
Owner’s Manual on Support.Dell.com/Manuals.
The Intel C600 chipset is implemented on the PowerEdge M620. For more information, visit
Intel.com.

More memory options are available than ever before with the Dell PowerEdge M620—greater
capacities, higher frequencies, and more flexibility. The M620 supports up to 768GB of memory
and speeds up to 1600 MT/s, providing high performance in a variety of applications. High memory
density means there is no compromise when it comes to virtualization.
Increase your uptime and reduce data loss, due to Dell’s focus on reliability, availability, and
serviceability (RAS) features. RAS aids in the rapid and accurate diagnosis of faults that require service,
increasing your memory reliability. System uptime is reinforced with RAS features like memory
mirroring, sparing, and many others.
In addition to supporting existing UDIMM and RDIMM technologies, the M620 supports load
reduced DIMMs (LRDIMMs), which use a buffer to reduce memory loading and allow for greater
density, allowing for the maximum platform memory capacity.
Table 6 lists the memory technologies supported by the M620.
Feature
UDIMM
RDIMM
LRDIMM
No
Yes
Yes
No
No
Yes
800, 1066, 1333, or
1600MT/s
800, 1066, 1333, or
1600MT/s
1066 or 1333MT/s
1 or 2
1, 2, or 4
4
2 or 4GB
2, 4, 8, 16, or 32GB
32GB
2
3
3
x8
x4 or x8
x4
Yes
Yes
Yes
Yes
Yes
Yes
Yes (with advanced
ECC mode)
Yes
Yes
Yes
Yes
Yes
*Although the M620 supports DIMM speeds of 800MT/s and 1066MT/s, you can only purchase this system with
DIMM speeds of 1333MT/s and 1600MT/s on Dell.com.

Table 7 lists the DIMMs that are supported on the M620. For the latest information on supported
memory, visit Dell.com.
Only
Capacity
(GB)
Speed
(MT/s)
Type
Ranks
per
DIMM
Data
width
SDDC support
Voltage
2
1600
RDIMM
1
x8
Advanced ECC
1.35
2
1333
RDIMM
1
x8
Advanced ECC
1.35
2
1600
UDIMM
1
x8
Advanced ECC
1.35
4
1333
RDIMM
2
x8
Advanced ECC
1.35
4
1600
RDIMM
2
x8
Advanced ECC
1.35
4
1333
RDIMM
1
x4
All modes
1.35
4
1333
RDIMM
2
x8
Advanced ECC
1.35
4
1600
UDIMM
2
x8
Advanced ECC
1.35
8
1333
RDIMM
2
x4
All modes
1.35
8
1600
RDIMM
2
x4
All modes
1.35
16
1600
RDIMM
2
x4
All modes
1.35
16
1333
RDIMM
2
x4
All modes
1.35
32
1333
LRDIMM
4
x4
All modes
1.35
32
1333
RDIMM
4
x4
All modes
1.35
The M620 server supports flexible memory configurations ranging from capacities of 2GB to 768GB
(using 32GB DIMMs), and up to 12 DIMMs per processor (up to 24 DIMMs in a dual-processor
configuration). Each processor has 4 memory channels, with each channel supporting up to 3
DIMMs.
The M620 is available in the following memory capacity options:
24-DIMM capacity: uses a 57mm heatsink and is recommended for use with processors of 95W
or less
20-DIMM capacity: uses a 77mm heatsink for cooling efficiency and is recommended for use
with 115W and 130W processors
16-DIMM capacity: uses a 97mm heatsink to support the higher ambient temperatures of fresh
air configurations
The M620 supports a flexible memory configuration according to the following basic rules:
Speed: If DIMMs of different speeds are mixed, all channels across all processors operate at the
slowest DIMM’s common frequency.
DIMM type: Only one type of DIMM is allowed per system: UDIMM, RDIMM, or LRDIMM. These
types cannot be mixed.
The following additional memory population guidelines apply to the M620:

Up to two quad-rank (QR) DIMMs and up to three dual-rank (DR) or single-rank (SR) DIMMs may
be populated per channel. Although an LRDIMM is physically a QR DIMM, logic on the LRDIMM
can make it appear as a DR DIMM to the system, allowing up to three LDRIMMs per channel.
DIMMs must be installed in each channel, starting with the DIMM farthest from the processor.
DIMMs should be installed with largest rank count to smallest. For example, if DR DIMMS are
mixed with SR DIMMs, DR DIMMS should be placed in the lowest DIMM slots, followed by the SR
DIMMs.
For more information on memory configuration and population, see the Dell PowerEdge M620
Systems Owner’s Manual on Support.Dell.com/Manuals.
The M620 supports memory speeds of 1600MT/s, 1333MT/s, 1066MT/s, and 800MT/s depending on
the DIMM types installed and the configuration. All memory on all processors and channels run at
the same speed and voltage. By default, the system runs at the highest speed for the channel with
the lowest DIMM voltage and speed. The operating speed of the memory is also determined by the
maximum speed supported by the processor, the speed settings in the BIOS, and the operating
voltage of the system.
Table 8 lists the memory configuration and performance details for the M620, based on the
population of the number and type of DIMMs per memory channel.

DIMM
type
DIMM 0
DIMM 1
DIMM 2
Number
of
DIMMs
Speed (MT/s)
800*
1066*
1333
1600
UDIMM
SR
1
∞
∞
∞
DR
1
∞
∞
∞
SR
SR
2
∞
∞
∞
SR
DR
2
∞
∞
∞
DR
DR
2
∞
∞
∞
RDIMM
SR
1
∞
∞
∞
∞
DR
1
∞
∞
∞
∞
QR
1
∞
∞
∞
SR
SR
2
∞
∞
∞
∞
SR
DR
2
∞
∞
∞
∞
DR
DR
2
∞
∞
∞
∞
QR
SR
2
∞
∞
QR
DR
2
∞
∞
QR
QR
2
∞
∞
SR
SR
SR
3
∞
∞
∞
SR
SR
DR
3
∞
∞
∞
SR
DR
DR
3
∞
∞
∞
DR
DR
DR
3
∞
∞
∞
QR
1
∞
∞
QR
QR
2
∞
∞
QR
QR
QR
3
∞
*Although the M620 supports DIMM speeds of 800MT/s and 1066MT/s, you can only purchase this system with DIMM
speeds of 1333MT/s and 1600MT/s on Dell.com.
Reliability, availability, and serviceability (RAS) features help keep the system online and operational
without significant impact to performance, and can decrease data loss and crashing due to errors.
RAS aids in rapid, accurate diagnosis of faults which require service. Table 9 describes the memory
RAS features supported on the M620.
Feature
Description
Dense configuration
optimized profile
Increased memory reliability can be a result from this selectable platform profile
that adjusts parameters to reduce faults regarding refresh rates, speed,
temperature and voltage.
Memory demand and
patrol scrubbing
Demand scrubbing is the ability to write corrected data back to the memory once
a correctable error is detected on a read transaction. Patrol scrubbing proactively
searches the system memory, repairing correctable errors.

Feature
Description
Recovery from single
DRAM device failure
(SDDC)
Recovery from Single DRAM Device Failure (SDDC) provides error checking and
correction that protects against any single memory chip failure as well as multi-bit
errors from any portion of a single memory chip.
Failed DIMM isolation
This feature provides the ability to identify a specific failing DIMM channel pair,
thereby enabling the user to replace only the failed DIMM pair.
Memory mirroring:
intra-socket
Memory mirroring is a method of keeping a duplicate (secondary or mirrored)
copy of the contents of memory as a redundant backup for use if the primary
memory fails. The mirrored copy of the memory is stored in memory of the same
processor socket.
Memory address parity
protection
This feature provides the ability to detect transient errors on the address lines of
the DDR channel.
Memory sparing (rank)
Memory sparing allocates one rank per channel as a spare. If excessive correctable
errors occur in a rank or channel, they are moved to the spare area while the
operating system is running to prevent the errors from causing an uncorrectable
failure.
Memory thermal
throttling
This feature helps to optimize power/performance and can also be used to
prevent DIMMs from overheating.
For information on memory mirroring and sparing configurations, see the Dell PowerEdge M620
Systems Owner’s Manual on Support.Dell.com/Manuals. Memory RAID is not supported.