Dell PowerEdge T20 Quick start guide

PowerEdge T20
Technical Guide
Quiet and compact,
the PowerEdge T20
server is ideal for
small and home
offices looking to
improve productivity
and efficiency.

Dell PowerEdge T20 Technical Guide 1
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October 2013 | Version 1.0

Dell PowerEdge T20 Technical Guide 2
Table of contents
1System overview................................................................................................................................................................. 4
New technologies ............................................................................................................................................................. 4
Comparison of selected PowerEdge one-socket tower servers.............................................................................. 4
PowerEdge T20 base fixed configurations ....................................................................................................................5
Specifications ..................................................................................................................................................................... 6
2Chassis views and features ............................................................................................................................................... 8
Chassis views...................................................................................................................................................................... 8
Chassis features ................................................................................................................................................................. 9
Quick Resource Locator ................................................................................................................................................ 10
Security features ............................................................................................................................................................... 11
3Processor............................................................................................................................................................................12
Processor features............................................................................................................................................................12
Supported processors......................................................................................................................................................12
Chipset................................................................................................................................................................................12
4Memory...............................................................................................................................................................................13
Supported memory ..........................................................................................................................................................13
5Storage ................................................................................................................................................................................14
Supported hard drives......................................................................................................................................................14
Storage controllers...........................................................................................................................................................14
Optical disk drive ..............................................................................................................................................................15
6Networking and PCIe .......................................................................................................................................................16
Integrated NIC controller................................................................................................................................................16
PCIe expansion .................................................................................................................................................................17
7Power, thermal and acoustics ........................................................................................................................................18
Power management.........................................................................................................................................................18
Power supply unit .............................................................................................................................................................19
Thermal and acoustics.....................................................................................................................................................19
8Operating systems and virtualization ........................................................................................................................... 20
Supported operating systems........................................................................................................................................ 20
Supported virtualization ................................................................................................................................................. 20
9Systems management ......................................................................................................................................................21
Server and embedded server management ................................................................................................................21
Additional specifications.......................................................................................................................... 22Appendix A.
System dimensions and weight .................................................................................................................................... 22
Environmental specifications ........................................................................................................................................ 22
Video specifications ........................................................................................................................................................ 23
USB peripherals................................................................................................................................................................ 23
Standards compliance ............................................................................................................................. 24Appendix B.
Additional resources................................................................................................................................. 26Appendix C.
System board block diagram .................................................................................................................. 28Appendix D.
Tables
Table 1. New technologies ................................................................................................................................................ 4
Table 2. Comparing the PowerEdge T110 II to PowerEdge T20 ................................................................................ 4
Table 3. PowerEdge T20 configuration options ............................................................................................................ 6
Table 4. Technical specifications...................................................................................................................................... 6
Table 5. Chassis configurations ........................................................................................................................................ 8

Dell PowerEdge T20 Technical Guide 3
Table 6. Chassis features.................................................................................................................................................... 9
Table 7. Security features .................................................................................................................................................. 11
Table 8. Supported processors ........................................................................................................................................12
Table 9. DIMMs supported................................................................................................................................................13
Table 10. Supported hard drives ........................................................................................................................................14
Table 11. Optical disk drive options ..................................................................................................................................15
Table 12. Intel Ethernet Connection I217.........................................................................................................................16
Table 13. PCI card dimensions...........................................................................................................................................17
Table 14. Power management features............................................................................................................................18
Table 15. Power supply specifications..............................................................................................................................19
Table 16. Primary operating systems supported............................................................................................................ 20
Table 17. Virtualization support ........................................................................................................................................ 20
Table 18. PowerEdge T20 dimensions and weight ....................................................................................................... 22
Table 19. Environmental specifications ........................................................................................................................... 22
Table 20. Video specifications ........................................................................................................................................... 23
Table 21. Industry standard documents .......................................................................................................................... 24
Table 22. Additional resources .......................................................................................................................................... 26
Figures
Figure 1. Front panel view and features............................................................................................................................ 8
Figure 2. Back panel view and features............................................................................................................................. 9
Figure 3. QRL location ....................................................................................................................................................... 10
Figure 4. PowerEdge T20 system board block diagram.............................................................................................. 28

Dell PowerEdge T20 Technical Guide 4
1System overview
The PowerEdge T20 mini-tower server packs large internal storage capacity and capable
performance into a compact, quiet chassis that delivers efficient, worry-free operation. It is an ideal
first server for small offices and home offices (SOHO), and excels at storing and sharing,
collaboration and productivity, and data protection. With support for up to six internal hard drives,
the T20 enables users to simplify their office IT by consolidating business information, images and
videos onto a single server, where it can be more easily shared and protected. Powerful Intel®Xeon®
or Pentium®multi-core processors drive applications and media faster, for quicker response times
and crisp video performance. The T20’s numerous USB ports permit the easy and flexible
attachment of external devices, and its small form factor and deskside acoustics allow it to be
installed anywhere.
New technologies
Table 1 details new technologies featured on the PowerEdge T20 server.
Table 1. New technologies
New technologies Detailed descriptions
Intel Xeon processor
E3-1200v3
product family and
Intel Pentium
processors
The Intel Xeon processor E3-1200v3 product family has advanced features that
deliver exceptional performance and value. See the Processor section for a full list of
processor options.
Intel C226 series
chipset
The PowerEdge T20 server uses the Intel Platform Controller Hub (PCH) chip. See
the Chipset section for details.
1600MT/s DDR3 ECC
memory
The PowerEdge T20 offers up to 32GB (4 DIMM slots) 2GB/4GB/8GB, 1600MT/s
unbuffered ECC memory. See the Memory section for details.
Integrated NIC The PowerEdge T20 features Intel 82579 Gigabit Ethernet LAN 10/100/1000. See the
Networking and PCIe section for details.
RAID controller
Intel Rapid Storage Controller software RAID is integrated on the PowerEdge T20
with hardware RAID available with an optional storage controller card. Visit the
Storage controllers section for details.
Comparison of selected PowerEdge one-socket tower servers
The PowerEdge T20 builds on the features of the PowerEdge T110 II to offer outstanding
performance and value for your small office or home office. Table 2 offers a comparison of the two
systems. For the latest information on supported features, visit Dell.com/PowerEdge.
Table 2. Comparing the PowerEdge T110 II to PowerEdge T20
Feature PowerEdge T110 II PowerEdge T20
Chassis 1U tower 1U mini-tower

Dell PowerEdge T20 Technical Guide 5
Processors Intel Xeon processor E3-1200
product family
Intel Xeon processor E3-
1200v3 product family,
Intel Pentium processors
Front side bus (FSB) DMI II (Direct Media Interface) Intel Direct Media Interface
Memory Up to 32GB (4 DIMMs):
1GB/2GB/4GB/8GB DDR3 up to
1600MT/s
Up to 32GB (4 UDIMM)
2GB/4GB/8GB unbuffered
1600MT/s ECC
Hard drive bays Up to 4 3.5" SATA/SAS (cabled) hard
drives or 6 x 2.5”
Up to 6 internal (cabled)
hard drives total:
•Up to four 3.5” SATA
hard drives, plus
•Up to two 2.5” SATA hard
drives (require expansion
kits) with optional
controller card
SATA ports/speed
(on-board)
5 ports; 5x3Gbps 4 ports; 2x6Gbps; 2x3Gbps
PCIe & PCI slots 1x16 (x8, 3.0)
1x8 (x8, 3.0)
1x8 (x4, 2.0)
1x4 (x1, 2.0)
1x16 (x16, PCIe 3.0)
1x16 (x4, PCIe 2.0)
1x1 (x1, PCIe 2.0)
1 PCI slot
USB 2 (front), 4 (rear) 2.0 2 (front), 4 (rear) 2.0
2 (front), 2 (rear) 3.0
Internal USB 2 (type-A adapter) 2 (10-pin)
LAN on motherboard
(LOM)
1 port 1 port
Power supplies 305W 80+ 290W
Systems management Basic management Intel Active Management
Technology (AMT) 9.0
(with Intel Xeon processors)
Software RAID PERC S100 Intel Rapid Storage
Controller 12.0
PowerEdge T20 base fixed configurations
The PowerEdge T20 offers three fixed configurations with options that enable you to tailor your T20
to best suit your needs. Contact your Dell service representative to:
•Install additional memory and hard drives.
•Add an operating system or application software.
•Add external devices, such as laptops, desktop PCs, printers and projectors.
•Add deployment services to get you up and running.
•Get support services to keep you running smoothly over time.
Table 3 outlines the three base fixed configurations on the T20 as well as additional options.

Dell PowerEdge T20 Technical Guide 6
Table 3. PowerEdge T20 configuration options
Configuration Description
1
•
1x Pentium processor
•1x 4GB DIMM
•No hard drive
•No optical drive
2
•
1x Pentium processor
•1x 4GB DIMM
•1x 500GB hard drive
•No optical drive
3
•
1x CPU Xeon
•1x 4GB DIMM
•1x 1TB hard drive
•No optical drive
Options
•
2
nd
– 4
th
DIMM
•2nd – 6th hard drive
•Optical drive (DVD)
•Operating system
Specifications
Table 4 lists the technical specifications for the PowerEdge T20. For the latest information on
supported features, visit Dell.com/PowerEdge.
Table 4. Technical specifications
Feature PowerEdge T20 technical specification
Form factor Mini tower (14.17”h x 6.89”w x 17.12”l)
Processors Intel®Xeon®processor E3-1200v3 product family
Intel Pentium®processors
Processor sockets 1 socket
Front side bus or
HyperTransport Intel Direct Media Interface
Cache 3M for dual-core
8M for quad-core
Chipset Intel C226
Memory1Up to 32GB (4 DIMM slots)
2GB/4GB/8GB 1600MT/s unbuffered with ECC only

Dell PowerEdge T20 Technical Guide 7
Feature
PowerEdge T20 technical specification
Memory speed 1333, 1600MT/s
Min/Max RAM 2GB/32GB
I/O slots
3 PCIe slots:
•1 x16 slot (3.0)
•1 x16 slot (2.0)
•1 x1 slot (2.0)
1 PCI slot
RAID controller
Intel Rapid Storage Controller 12.0 supporting:
•SATA 6Gbps (2 ports: SATA0, SATA1)
•SATA 3Gbps (2 ports+ SATA2, SATA3)
•4 SATA connectors support optional additional hard drives and
optical drives
Drive bays
Up to 6 internal (cabled) hard drives in total:
•Up to 4 3.5” SATA hard drives, plus
•Up to 2 2.5” SATA hard drives (require expansion kits) with
optional controller card
Maximum internal storage
13TB (four x 3.5” 3TB; two x 2.5” 500G)
Hard drives1
3.5” Client SATA
(7.2K RPM): 500GB
and 1TB
3.5” Enterprise
SATA (7.2K RPM):
2TB and 3TB
2.5” SATA
2.5” (10K RPM) 250G and 500G
2.5” SATA SSD: 2.5”, 6Gb, 160G
Integrated LOM/NIC Integrated Intel I217 Gigabit Ethernet LAN 10/100/1000
Power supply Cabled 290W auto-sensing
USB 2 (front), 4 (rear) 2.0
2 (front), 2 (rear) 3.0
Availability Error Correction Code (ECC) memory; software RAID
Optical drive 5.25” slim optical drive slot
Video Integrated Intel HD Graphics P4600 with 2x DP + 1x VGA*
Integrated Intel HD Graphics 4600 with 2x DP + 1x VGA *
Systems management Intel AMT 9.0 (with Xeon processor only)
Operating systems Microsoft Windows Server 2012
Microsoft Windows Server 2012 R2
*Integrated graphic varies, depending on CPU offerings.

Dell PowerEdge T20 Technical Guide 8
2Chassis views and features
The Dell PowerEdge T20 is a one-socket tower server. For additional system views and features, see
the
Dell PowerEdge T20 Systems Owner’s Manual on Dell.com/Support/Manuals.
Chassis views
This chassis should be supported in the configurations detailed in Table 5.
Table 5. Chassis configurations
Number of
drive bays Drive types Controller
Front
control
panel
Power supply Rack
option
4 cabled
drive bays
3.5” SATA or 2x
2.5” + 4x 3.5”
cabled hard
drives
Intel Rapid Storage Controller
12.0 LED Cabled 350W No
Figure 1 shows the features on the front of the T20 chassis with the USB connectors and other
components and features described in this guide.
Figure 1. Front panel view and features
P
OWER
B
UTTON
/P
OWER
L
IGHT
O
PTICAL
D
RIVE
B
AY
(
OPTIONAL
)
HEADPHONE INPUT
USB 2.0 CONNECTOR (2)
D
RIVE
A
CTIVITY LIGHT
MICROPHONE INPUT
USB 3.0 CONNECTOR (2)

Dell PowerEdge T20 Technical Guide 9
Figure 2 shows the features on the back of the T20 chassis with components and features described
in this guide.
Figure 2. Back panel view and features
Chassis features
Table 6 lists the PowerEdge T20’s many chassis features. For additional information, see the Dell
PowerEdge T20 Systems Owner’s Manual
on Dell.com/Support/Manuals.
Table 6. Chassis features
Feature
Description
Power button ACPI-compliant power button with an integrated green power LED
Front bezel Covers the server’s front-loading hard drives and locks for security
NMI button Used to troubleshoot software and device driver errors; use only if directed
by qualified support personnel or by the operating system's documentation
System identification button Buttons on the back and front of a system to help identify the unit in a data
center environment
Hard drives
Up to four 3.5” SATA hard drives, plus
Up to two 2.5” SATA hard drives (require expansion kits) with optional
controller card
PADLOCK RING
SECURITY CABLE SLOT
E
XPANSION CARD SLOTS
BACK PANEL CONNECTORS
POWER CONNECTOR
POWER SUPPLY
DIAGNOSTIC LIGHT

Dell PowerEdge T20 Technical Guide 10
Feature
Description
USB connectors Connects USB devices to the server
Information tag Slide-out label panel for recording system information
Video connector Connects a monitor to the server; one port on the back of the tower chassis
or a port on both the front and back of the rack chassis
LCD panel and buttons
Displays system ID, status information and system error messages; two
navigation buttons on the hot-plug chassis to scroll through the menu on
the LCD and one select button
Optical drive (optional) Optional half-height DVD or DVD+RW drive
Power supply units Supplies power to the server
Power supply indicators Indicates whether server has power
NIC indicators Indicates network activity and status
PCIe slots Connects PCIe expansion cards to the server
Ethernet connectors Connects integrated 10/100/1000 NICs to the server
Serial connector Connects a serial device to the server
Quick Resource Locator
Dell PowerEdge 12th generation servers feature a Quick Resource Locator (QRL) — a model-specific
Quick Response (QR) code that is located inside the T20 chassis cover (see Figure 3). Use your
smartphone to access the Dell QRL app to learn more about the server.
Figure 3. QRL location
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.

Dell PowerEdge T20 Technical Guide 11
Security features
The latest generation of PowerEdge servers has the features listed in Table 7 to help ensure the
security of your data center.
Table 7. Security features
Security feature Description
Cover latch A tooled latch is integrated in the top cover to secure it to the
rack chassis.
Front bezel A metal bezel is mounted to the chassis front to provide the Dell
ID. A lock on the bezel is used to protect un-authorized
access to
hard drives. System status is viewable on the LCD or LED panel
when the bezel is installed.
TPM
The Trusted Platform Module (TPM) is used to generate/store
keys, protect/authenticate passwords and create/store digital
certificates. It also supports the Intel Xeon TXT functionality. TPM
can also be used to enable the BitLocker™ hard drive encryption
feature in Windows Server 2008. TPM 1.2 is supported. No TPM
version is available for China or Russia.
Power-off security BIOS has the ability to disable the power button function.
Intrusion alert An internal switch is used to detect chassis intrusion.
Secure mode
BIOS has the ability to enter a secure boot mode through system
setup. This mode includes the option to lock out the power and
NMI switches on the control panel or set up a system password.
.

Dell PowerEdge T20 Technical Guide 12
3Processor
The Dell PowerEdge T20 offers Intel Pentium processors and the next-generation Intel Xeon
processor E3-1200v3 product family, which features enhanced media, graphics capabilities,
flexibility and enhanced security. Manufactured on industry-leading 22nm process technology with
3D Tri-Gate transistors, the Intel Xeon processor E3-1200v3 family offers numerous advancements
over the Intel Xeon processor E3-1200v2 family.
Processor features
The Intel Xeon processor E3-1200v3 product family features include:
•Enhanced energy efficiency and performance
•Support for ECC memory for better data integrity, reliability and system uptime
•High-end media and graphics capabilities for devices that display videos, 2D and 3D graphics
and interactive content
•Intel Turbo Boost Technology 2.0 to accelerate processor and graphics performance for
peak loads
•Intel Hyper-Threading Technology for faster performance for demanding business
applications
•Continued improvements to both Intel TXT and AES-NI help to better protect systems and
data
Supported processors
Table 8 lists the Intel processors supported by the PowerEdge T20. For the latest information on
supported processors, visit Dell.com/PowerEdge.
Table 8. Supported processors
Model Speed TDP Cache Cores/
threads
Max memory
speed Turbo
Xeon E3-1225v3
3.2GHz
84W
8MB
4/8
1600MT/s
Yes
Pentium G3220 3.0GHz 54W 3MB 2/2 1333MT/s MP
For more information supported Intel processors, visit Intel.com. For information on processor
installation and configuration, see the Dell PowerEdge T20 Systems Owner’s Manual on
Dell.com/Support/Manuals.
Chipset
The Intel C226 chipset is implemented on the Dell PowerEdge T20. For more information, visit
Intel.com.

Dell PowerEdge T20 Technical Guide 13
4Memory
More options are available for the Dell PowerEdge 12th generation servers than in previous
generations — more capacity choices and more frequency choices. The PowerEdge T20 supports
up to 32GB of memory with speeds of up to 1600MT/s, providing high performance in a variety of
applications.
Supported memory
The T20 supports memory speeds of 1600MT/s and 1333MT/s, depending on the DIMM types
installed and the configuration. All memory on all processors and channels runs 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 T20 supports the DIMMs listed in Table 9. For the latest information on supported memory, visit
Dell.com/PowerEdge.
Table 9. DIMMs supported
Capacity
Speed
Type
Ranks per
DIMM
2GB
1333/1600
MT/s UDIMM 1
2GB
1333/1600
MT/s UDIMM 1
4GB
1333/1600
MT/s UDIMM 1
4GB
1333/1600
MT/s UDIMM 1
4GB
1333/1600
MT/s UDIMM 2
8GB
1333/1600
MT/s UDIMM 2
8GB
1333/1600
MT/s UDIMM 1
8GB
1333/1600
MT/s UDIMM 2
16GB
1333/1600
MT/s UDIMM 2
16GB
1333/1600
MT/s UDIMM 2
32GB
1333/1600
MT/s UDIMM 2

Dell PowerEdge T20 Technical Guide 14
5Storage
The Dell PowerEdge T20 supports up to four 3.5-inch hard drives and up to two 2.5-inch hard
drives.
•4x 3.5-inch cabled drive bays from motherboard SATA connector
•3x 3.5-inch cabled SATA, plus SATA optical disk drive device from motherboard SATA
connector
•2x 2.5-inch cabled SATA via add-on storage controller, plus 4x 3.5-inch cabled SATA from
motherboard SATA connector
Supported hard drives
Table 10 lists the PowerEdge T20 hard drive options. For additional information, see
Dell.com/PowerEdge.
Table 10. Supported hard drives
Form factor Type Speed
(rpm)
Capacities
2.5”
SATA 10K 250GB, 500GB
SATA SSD 6Gb 160GB
3.5”
SATA 7.2K 500GB, 1TB
Enterprise 7.2K 2TB, 3TB
Storage controllers
The PowerEdge T20 supports Intel Rapid Storage Controller 12.0 software RAID and hardware RAID
from the optional storage controller card available at Dell.com.
The PEXSAT32 2-Port PCIe SATA 6GB controller card offers simple
connectivity between a host computer and SATA 3.0 devices — a cost-
effective solution for connecting high-speed storage, such as High RPM
hard drives and solid state drives (SSD), which in turn allows for easier data
backups and archiving.
Note: Additional SATA cables are required to connect the card with fourth and
fifth hard drives and an additional power extension cable is required to connect
the system power to these drives.
StarTech Part #: PEXSAT32
Dell Part#: A4046565

Dell PowerEdge T20 Technical Guide 15
Optical disk drive
The PowerEdge T20 supports one internal slim optical drive and is able to boot from any internal
optical drive. Table 11 lists supported optical disk drive options.
Table 11. Optical disk drive options
Optical disk drive Supported
Slimline 6X Blu-ray Writer SATA 1.5Gbps Yes
Slimline 8X DVD+/-RW1 SATA 1.5Gbps Yes
Slimline 8X DVD-ROM2 SATA 1.5Gbps Yes
The PowerEdge T20 server supports “no optical drive” configurations, support for optional internal
DVD-ROM (SATA) and support for optional internal DVD+RW (SATA).
Note:An additional power extension cable is required to connect the system power to fourth and fifth hard
drives, and an optical disk drive.

Dell PowerEdge T20 Technical Guide 16
6Networking and PCIe
The Dell PowerEdge T20 offers balanced, scalable I/O capabilities, including integrated PCIe 2.0-
and 3.0-capable expansion slots.
Integrated NIC controller
The PowerEdge T20 has an integrated Intel Ethernet Connection I217 chip for performance-
enhancing features:
•Cost-optimized single GbE (1GbE)
•Small 6x6mm quad-flat, no-leads (QFN) package
•Intel power optimizer
•500mW TDP with typical ~ 400mW GbE
•Energy-Efficient Ethernet (EEE)
Table 12 outlines additional specifications of the Intel Ethernet Connection I217.
Table 12. Intel Ethernet Connection I217
Features
External connector type RJ45
Data rates supported 10/100/1000Mbps
Controller bus architecture PCIe-based interface for S0 state,
SMBus for Sx low power state
Integrated memory No
Data transfer mode (example Bus-Master DMA) No
Power consumption (full operation per data rate
connection speed) 535mW (Maximum)
Power consumption (standby operation) 176mW (Maximum)
IEEE standards compliance (example 802.1P) 802.3
Boot ROM support EEPROM (located in SPI)
Network
transfer mode
Network transfer rate
•10BASE-T (full-duplex) 20Mbps
•100BASE-TX (half-duplex) 100Mbps
•100BASE-TX (full-duplex) 200Mbps
•1000BASE-T (full-duplex) 2000Mbps
10Mb (full/half-duplex)
100Mb (full/half-duplex)
1000Mb (full-duplex)
Environmental Operating temperature 0° to 85°C (32° to 185°F)

Dell PowerEdge T20 Technical Guide 17
Operating humidity 20% to 80% (non-
condensing)
Operating system driver support Microsoft Windows 7 32/64,
Microsoft Windows 8 32/64
Manageability Wake On LAN (WOL)
Pre-boot eXecution
Environment (PXE) 2.1
Management capabilities and alerting Intel Standard Manageability
Intel Core 2 Duo/Quad
Processor with vPro
Technology
PCIe expansion
PCIe connectivity is integrated with the processor. The T20 supports up to four PCIe slots. PCI card
dimensions are outlined in Table 13.
•1x PCIe x16 slot 3.0
•1x PCIe x16 (wired x4) slot 2.0
•1x PCIe x1 slot 2.0
•1x PCI 32/33 slot
Table 13. PCI card dimensions
Type
Voltage
supported Max height Max length Max wattage
Cards
supported
PCIe x16 3.0 3.3V/12V 4.38 in/11.13 cm
full height
6.6 in/16.77 cm
half length
75* Graphics
Gigabit NIC
Parallel/Serial
PCIe x1 2.0 3.3V/12V 4.38 in/11.13 cm
full height
6.6 in/16.77 cm
half length
25 Gigabit NIC
Parallel/
Serial
PCI 3.3V/5V/12V/-
12V
4.38 in/11.13 cm
full height
6.6 in/16.77 cm
half length
25 1394
PCIe x16 (x4) 2.0 3.3V/12V 4.38 in/11.13 cm
full height
6.6 in/16.77 cm
half length
25* Graphics,
Gigabit NIC
Parallel/Serial

Dell PowerEdge T20 Technical Guide 18
7Power, thermal and acoustics
Lower overall system-level power draw is a result of breakthrough system design. The Dell
PowerEdge T20 server maximizes performance per watt through a combination of power and
cooling, energy-efficient technologies and tools. Additionally, the PowerEdge T20 has an extensive
collection of sensors that automatically track thermal activity, which helps regulate temperature,
thereby reducing server noise and power consumption.
Power management
Table 14 summarizes power management features on the PowerEdge T20.
Table 14. Power management features
Feature Type Enable/Status/Ctrl
bit location Description
ACPI mode switch Fixed PCH The operating system uses the
SCI_EN bit in PCH to switch
from legacy mode to ACPI
mode.
Sleep states Fixed PCH Supported states: S0 (Working),
S4-OS (‘Hibernation’), and S5
(Soft-off).
S1 (also called ‘standby’ or
‘suspend’) and S3 are not
supported.
Power button Fixed PCH In ACPI mode, the operating
system has control of the power
button. In non-ACPI mode, SMI
handler owns power button
events.
Real-time clock (RTC) Fixed PCH The operating system is able to
configure the system to wake on
the RTC alarm.
Power management timer Fixed PCH PCH 32-bit power management
timer is used.
Power management event
(PME)
Generic PCH When a device signals PME, the
system wakes (if necessary), the
OS detects the event, and a Dell-
defined ASL routine handles the
event. Wake-on-LAN is one
example of a PME.
DBS N/A Processor MSRs This feature does P state
transition under Windows.
C state support N/A Processor and PCH
registers
This feature allows multiple C
state support for the processor.
This feature will work under
Windows and ACPI OS that
understand C states.

Dell PowerEdge T20 Technical Guide 19
Power supply unit
The PowerEdge T20 includes a single 290W cabled auto-sensing power supply that provides power to
the T20 planar, the four internal hard drive bays and the two 2.5” internal drive bays. Table 15 details
Power supply specifications.
Table 15. Power supply specifications
Specification 290W AC
Current
consumption 10A–5A
Supply voltage 100–240VAC1
Frequency 50/60Hz
Heat dissipation
(BTU/hr max.) 989
Thermal and acoustics
Optimized thermal management makes the PowerEdge T20 cool and quiet. Benefiting from a smart
cooling thermal control algorithm, the T20 offers both high performance and quiet acoustics across
a wide range of ambient temperatures (5°C ~ 35°C). Though the fan-induced sound is inevitable for
cooling purposes, it is controlled to be smooth and quiet. In a typical office environment (~45dBA),
the sound is almost unnoticeable.