Product comparison · 2 pcs/workstations

Lenovo ThinkStation D20 (4155-79G), IT vs Lenovo ThinkStation D20 + ThinkVision L2251p

86specifications compared
12differ
74identical
23known for one product only

Key differences

Processor model
- ThinkStation D20 (4155-79G), IT:E5507
- ThinkStation D20 + ThinkVision L2251p:E5506
Processor frequency
- ThinkStation D20 (4155-79G), IT:2.26 GHz
- ThinkStation D20 + ThinkVision L2251p:2.13 GHz
HDD capacity
- ThinkStation D20 (4155-79G), IT:500 GB
- ThinkStation D20 + ThinkVision L2251p:250 GB
HDD interface
- ThinkStation D20 (4155-79G), IT:SATA II
- ThinkStation D20 + ThinkVision L2251p:SATA
PS/2 ports quantity
- ThinkStation D20 (4155-79G), IT:0
- ThinkStation D20 + ThinkVision L2251p:2
Display included
- ThinkStation D20 (4155-79G), IT:No
- ThinkStation D20 + ThinkVision L2251p:Yes
Processor ARK ID
- ThinkStation D20 (4155-79G), IT:37100
- ThinkStation D20 + ThinkVision L2251p:37096
Processor code
- ThinkStation D20 (4155-79G), IT:SLBKC
- ThinkStation D20 + ThinkVision L2251p:SLBF8

Side by side

Differences highlightedShow differences only

Comparison of ThinkStation D20 (4155-79G), IT, ThinkStation D20 + ThinkVision L2251p
109 specifications	A Lenovo ThinkStation D20 (4155-79G), IT View product	B Lenovo ThinkStation D20 + ThinkVision L2251p View product
Processor2 differ
Processor manufacturer	Intel	Intel
Processor family	Intel® Xeon® 5000 Sequence	Intel® Xeon® 5000 Sequence
Processor modelDiffers	E5507	E5506
Processor cores	4	4
Processor threads	4	4
Processor frequencyDiffers	2.26 GHz	2.13 GHz
Processor cache	4 MB	4 MB
Processor cache type	Smart Cache	Smart Cache
Bus type	QPI	QPI
FSB Parity	No	No
System bus rate	4.8 GT/s	4.8 GT/s
Processor lithography	45 nm	45 nm
Processor operating modes	64-bit	64-bit
Processor series	Intel Xeon 5500 Series	Intel Xeon 5500 Series
Processor codename	Nehalem EP	Nehalem EP
Thermal Design Power (TDP)	80 W	80 W
Tcase	76 °C	76 °C
Number of QPI links	2	2
Processor socket	Socket B (LGA 1366)	Socket B (LGA 1366)
Stepping	D0	D0
Maximum internal memory supported by processor	144 GB	144 GB
Memory types supported by processor	DDR3-SDRAM	DDR3-SDRAM
Memory clock speeds supported by processor	800 MHz	800 MHz
Memory bandwidth supported by processor (max)	19.2 GB/s	19.2 GB/s
ECC supported by processor	Yes	Yes
Processor system typeKnown for one	Unknown — not stated by the source	DP
CPU multiplier (bus/core ratio)Known for one	Unknown — not stated by the source	16
Memoryidentical
Internal memory	3 GB	3 GB
Maximum internal memory	96 GB	96 GB
Internal memory type	DDR3-SDRAM	DDR3-SDRAM
Memory layout (slots x size)	3 x 1 GB	3 x 1 GB
Memory clock speed	1066 MHz	1066 MHz
Memory channels	Triple-channel	Triple-channel
Memory slotsKnown for one	Unknown — not stated by the source	12x DIMM
ECCKnown for one	Unknown — not stated by the source	Yes
Storage2 differ
Optical drive typeKnown for one	DVD-RW	Unknown — not stated by the source
HDD capacityDiffers	500 GB	250 GB
HDD interfaceDiffers	SATA II	SATA
Card reader integrated	Yes	Yes
Compatible memory cardsKnown for one	CF, MMC, SD, xD	Unknown — not stated by the source
HDD speedKnown for one	Unknown — not stated by the source	7200 RPM
Performanceidentical
Product type	Workstation	Workstation
Motherboard chipsetKnown for one	Unknown — not stated by the source	Intel® 5520
Optical driveidentical
CD read speedKnown for one	40x	Unknown — not stated by the source
Ports & interfaces1 differ
USB 2.0 ports quantity	10	10
Ethernet LAN (RJ-45) ports	2	2
Headphone outputs	1	1
Line-inKnown for one	Yes	Unknown — not stated by the source
Microphone in	Yes	Yes
VGA (D-Sub) ports quantity	0	0
PS/2 ports quantityDiffers	0	2
Firewire (IEEE 1394) ports	2	2
eSATA ports quantityKnown for one	1	Unknown — not stated by the source
Serial ports quantity	1	1
Parallel ports quantity	0	0
Expansion slotsidentical
PCI Express x16 slotsKnown for one	1	Unknown — not stated by the source
PCI slotsKnown for one	2	Unknown — not stated by the source
Poweridentical
Power requirementsKnown for one	100-240V; 50/60Hz	Unknown — not stated by the source
Power supplyKnown for one	1060 W	Unknown — not stated by the source
Designidentical
Chassis type	Tower	Tower
Softwareidentical
Operating system installed	Windows 7 Professional	Windows 7 Professional
Optional operating system suppliedKnown for one	Windows XP Professional	Unknown — not stated by the source
Compatible operating systemsKnown for one	Windows XP Pro SP1a/SP2a 32/64-bit Red Hat Enterprise Linux 5.0 Windows Vista 32/64-bit Windows Vista Enterprise 32/64-bit Windows Vista Ultimate 32/64-bit	Unknown — not stated by the source
Display1 differ
Display includedDiffers	No	Yes
Display diagonalKnown for one	Unknown — not stated by the source	55.9 cm (22")
ResolutionKnown for one	Unknown — not stated by the source	1680 x 1050 pixels
Processor special features2 differ
Embedded options available	No	No
Enhanced Intel SpeedStep Technology	Yes	Yes
Execute Disable Bit	Yes	Yes
Idle States	Yes	Yes
Intel 64	Yes	Yes
Intel Clear Video Technology	No	No
Intel Demand Based Switching	Yes	Yes
Intel Dual Display Capable Technology	No	No
Intel Enhanced Halt State	Yes	Yes
Intel FDI Technology	No	No
Intel Fast Memory Access	No	No
Intel Flex Memory Access	No	No
Intel Rapid Storage Technology	No	No
Intel Trusted Execution Technology	No	No
Intel VT-x with Extended Page Tables (EPT)	Yes	Yes
Intel Virtualization Technology (VT-x)	Yes	Yes
Intel Virtualization Technology for Directed I/O (VT-d)	Yes	Yes
Intel® AES New Instructions (Intel® AES-NI)	No	No
Intel® Clear Video HD Technology (Intel® CVT HD)	No	No
Intel® Clear Video Technology for Mobile Internet Devices (Intel CVT for MID)	No	No
Intel® InTru™ 3D Technology	No	No
Intel® Insider™	No	No
Intel® Smart Cache	Yes	Yes
Intel® Wireless Display (Intel® WiDi)	No	No
Physical Address Extension (PAE)	Yes	Yes
Processor ARK IDDiffers	37100	37096
Processor codeDiffers	SLBKC	SLBF8
Thermal Monitoring Technologies	No	No
Intel® Turbo Boost Technology	No	No
Intel® Hyper Threading Technology (Intel® HT Technology)	No	No
Intel® Quick Sync Video Technology	No	No
Intel® My WiFi Technology (Intel® MWT)	No	No
Intel® Anti-Theft Technology (Intel® AT)	No	No
Conflict-Free processor	No	No
CPU configuration (max)Known for one	Unknown — not stated by the source	2
Processor package sizeKnown for one	Unknown — not stated by the source	42.5 x 45 mm
Audio1 differ
Audio systemDiffers	ADI 1988 A	High Definition Audio
Weight & dimensions3 differ
Width	210 mm	210 mm
DepthDiffers	579 mm	602 mm
HeightDiffers	485 mm	434 mm
WeightDiffers	24.9 kg	25 kg
Packaging contentidentical
Mouse includedKnown for one	Yes	Unknown — not stated by the source
Keyboardidentical
Keyboard typeKnown for one	Preferred Pro USB	Unknown — not stated by the source

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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