
Processor
Implementation
Memory
Graphics
Media reader
SATA disk(s)
S ATA DV D ±RW
Disk controller
Chipset
Front ports
Rear ports
IEEE 1394 adptr
Audio
Speaker
Ethernet
Security chip
Keyboard
Mouse
Power supply
Cooling
Rack mount
Intel Xeon®Processor W3503 or W3505 with dual-core,
4.8GT/s (giga-transfers/second) QPI (QuickPath Interconnect),
Intel 64, Virtualization Technology,
1066MHz DDR3 memory controller, and 4MB cache or
Intel Xeon Processor W3520 with quad-core, 4.8GT/s QPI,
Intel 64, Hyper-Threading Technology, Virtualization Technology,
Turbo Boost Technology (up to 2.93GHz at max turbo mode),
1066MHz DDR3 memory controller, and 8MB cache
Processor uses FC-LGA8 package, one LGA1366 socket
2GB or 4GB std, 24GB max, UDIMM,
PC3-10600 1333MHz DDR3
***
, ECC,
3-channel capable, six 240-pin DIMM sockets
*** System automatically clocks down for processors with 1066MHz
DDR3 memory controller
Two PCI Express®x16 adapters required for quad monitor support,
* Adapters >75W use auxiliary power connector(s) from PSU
Some: NVIDIA®Quadro®FX 380, PCIe x16 adapter, 256MB,
two dual-link DVI-I, 35W
Some: NVIDIA Quadro FX 580, PCIe x16 adapter, 512MB,
two DisplayPort, one dual-link DVI-I****, 40W
Some: NVIDIA Quadro FX 1800, PCIe x16 adapter, 768MB,
two DisplayPort, one dual-link DVI-I****, 59W
**** Only two display connectors are active at a time
20-in-1 media reader, internal USB 2.0
500GB, SATA 3.0Gb/s, 7200 rpm, 3.5"
Super Multi-Burner DL DVD±RW SATA 1.5Gb/s Drive
Serial ATA, SATA 3.0Gb/s, integrated in ICH10R,
three SATA connectors for disks, two SATA connectors for opticals
Intel X58 Express Chipset, Intel I/O Controller Hub 10 RAID
(ICH10R) for RAID 0, 1, 5 support,
Winbond® W83627DHG-P Super I/O
Two USB 2.0, microphone (3.5mm), headphone (3.5mm)
Eight USB 2.0, eSATA, serial (9-pin), ethernet (RJ-45), six analog audio ports
(line-in, mic-in, front-out, rear-out, center/sub-out, side-out),
Optical SPDIF digital out, Optical SPDIF digital in
None
High Definition (HD) Audio, Analog Devices AD1988A codec
Internal speaker for business audio
One gigabit ethernet on planar, Broadcom®BCM5755
Broadcom Trusted Platform Module, TCG 1.2-compliant
Preferred Pro USB Keyboard (USB connector), 104-key, black
Optical Wheel Mouse (USB connector), black
625 watts with 120mm bottom-mounted variable speed fan, universal,
Climate Savers®Computing Bronze, 80 PLUS® Bronze qualified
3 to 5 fans (power supply, CPU, rear, opt front PCI [>75W graphics], opt front [SAS])
Rack shelf support
S20 4105-97U 5x6 W3503 2.40 2x1GB
1333MHz
1x500GB23.5" No DVD±RW Media 1xFX380 No Pending Pro64 Oct 09
S20 4105-98U 5x6 W3505 2.53 2x1GB
1333MHz
1x500GB 3.5" No DVD±RW Media 1xFX580 No Pending Pro64 Oct 09
S20 4105-99U 5x6 W3520 2.66 2x2GB 1333
MHz
1x500GB 3.5" No DVD±RW Media 1xFX1800 No Pending Pro64 Oct 09
ThinkStation®S20 (4105) - TopSeller (Windows 7)
GHzProcessor Disk(s)
SATA
optical
Graphics
adapter(s) Avail
dateName
Slot x
bay
Personal Systems Reference (PSREF)
ENERGY
STAR 5.0
See footnotes for important warranty information
US models announced October 22, 2009
✂ US model withdrawn effective August 2010
© Lenovo
(SEV3-2) May 2010
✂
SECURITY
• Security chip (see information on left)
•Side cover lock (ships with two identical
keys)
• Padlock loop (in rear for opt padlock;
padlock prohibits side cover removal)
• Security slot (in rear for optional
Kensington®Microsaver®cable;
prohibits side cover removal)
• Power-on password
• Administrator password
• Boot sequence control
• Boot without keyboard, mouse, diskette
• Serial port I/O control
• USB port disablement (front or all)
• Faster, more efficient architecture with the latest Intel® workstation technology
• High performance workstation with premium graphics for specialized professionals
• Environmentally friendly, cool, and quiet with rock solid engineering
• Innovative thermal design with optimized fan placement, for a cooler, quieter, more reliable PC
• These small and medium business (SMB) models are part of the US TopSeller
™Program
• These models have a 3-year limited warranty1
• These systems are Microsoft®Office 2010 Product Key Ready (O10PKR)
Pre-config
RAID
Type-
model
Memory
speed
GREENGUARD® certified
RoHS-compliant
Pending: ENERGY STAR®5.0-compliant
Supports ThinkVantage®technologies
•Raven black color; metal case
•6.9"W x 19.0"D x 18.8"H (with handle)
•175mm W x 483mm D x 478mm H
•38.5 lb (17.5kg) max configuration
•31-liter
•Removable handle on top front
•Toolless side cover removal
•Toolless disk and optical drive removal
•Toolless adapter retention
•Illuminated front icons
•Rack shelf support
Slot 1: full-length, full-height, PCIe 2.0 x16
(75W* max)
Slot 2: full-length, full-height, PCIe 2.0 x4**
Slot 3: full-length, full-height, PCIe 2.0 x16
(75W* max)
Slot 4: full-length, full-height, PCIe x1
Slot 5: half-length, full-height, 32-bit PCI 2.3
** x16 mechanical
Tower
Bay ①5.25", 1.6" high, external, std optical
Bay ②5.25", 1.6" high, external, open
Bay ③3.5", 1" high, external, std media reader
Bay ④3.5", 1" high, internal, std disk
Bay ⑤ 3.5", 1" high, internal, opt disk
Bay ⑥ 3.5", 1" high, internal, opt disk
Memory
DIMMs
Disk
size
Diskette
or Media
reader
Preloaded operating system20
- Genuine Windows® 7
Professional 64
Preloaded applications5(only some
listed)
•Rescue and Recovery™
•ThinkVantage System Update
•Norton Internet Security™
(30 days of virus definitions)
•Adobe®Reader
• Microsoft Office 2010 preloaded;
purchase product key to activate
•Roxio®Creator®Business Edition
(DVD±RW)
•Roxio MyDVD®(DVD±RW)
•Corel®WinDVD®(DVD±RW)
Accessories
2GB PC3-8500 DDR3 ECC UDIMM 51J0504
2GB PC3-10600 DDR3 ECC UDIMM 43R2033
4GB PC3-10600 DDR3 ECC UDIMM 57Y4138
1TB SATA 3.0Gb/s Disk (7200 rpm) 45J7918
Blu-ray™Burner SATA 1.5Gb/s 45K1675
ThinkVision
®
L2440p Wide 24" Monitor 4420HB2
NVIDIA Quadro NVS 290 43R1765
AT I ™FirePro™1GB V7750 51J0511
Other accessories at lenovo.com/accessories
LIMITED WARRANTY1
➫ 3-year parts and labor
➫ Customer Replaceable Unit (CRU)
parts only (with limited onsite service
for selected parts3, 8 am - 5 pm,
Mon - Fri coverage excluding holidays,
next business day response time)
➫ThinkPlus™services available; see
http://lenovo.com/thinkplus/warranty
•Onsite service upgrade options
(in eligible locations)7
•Post warranty maintenance
services
➫ 24 hour x 7 day14 toll-free support
during the warranty period1
via 800-426-7378
media
optical
optical
disk
disk
disk
Win7
preload
1394
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