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Product comparison · 2 pcs/workstations

Lenovo D20 (4155-22G) vs Lenovo M90 + L2251p

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  • 85specifications compared
  • 51differ
  • 34identical
  • 61known for one product only

Key differences

  • Processor family
    • Intel® Xeon® 5000 Sequence
    • Intel® Core™ i3
  • Processor model
    • E5520
    • i3-530
  • Processor cores
    • 4
    • 2
  • Processor threads
    • 8
    • 4
  • Processor frequency
    • 2.26 GHz
    • 2.93 GHz
  • Processor cache
    • 8 MB
    • 4 MB
  • Bus type
    • QPI
    • DMI
  • System bus rate
    • 5.86 GT/s
    • 2.5 GT/s

Side by side

Differences highlightedShow differences only
146 specifications
A

Lenovo

D20 (4155-22G)View product
B

Lenovo

M90 + L2251pView product
Processor22 differ
Processor familyDiffersIntel® Xeon® 5000 SequenceIntel® Core™ i3
Processor generationKnown for oneIntel® Core™ i3
Processor modelDiffersE5520i3-530
Processor coresDiffers42
Processor threadsDiffers84
Processor frequencyDiffers2.26 GHz2.93 GHz
Processor cacheDiffers8 MB4 MB
Bus typeDiffersQPIDMI
System bus rateDiffers5.86 GT/s2.5 GT/s
Processor lithographyDiffers45 nm32 nm
Processor seriesDiffersIntel Xeon 5500 SeriesIntel Core i3-500 Desktop Series
Processor codenameDiffersNehalem EPClarkdale
Thermal Design Power (TDP)Differs80 W73 W
TcaseDiffers72 °C72.6 °C
Maximum number of PCI Express lanesKnown for one16
PCI Express configurationsKnown for one1x16, 2x8
PCI Express slots versionKnown for one2.0
Processor socketDiffersSocket B (LGA 1366)LGA 1156 (Socket H)
Number of Processing Die TransistorsDiffers731 M382 M
Processing Die sizeDiffers263 mm²81 mm²
CPU multiplier (bus/core ratio)Differs1722
PlatformKnown for onePC
SteppingDiffersD0C2
Maximum internal memory supported by processorDiffers144 GB16 GB
Memory types supported by processorDiffersDDR3-SDRAMDDR3 1066/1333
Memory bandwidth supported by processor (max)Differs25.6 GB/s21 GB/s
ECC supported by processorDiffersYesNo
Processor boost frequencyKnown for one2.53 GHz
Processor system typeKnown for oneDP
Number of QPI linksKnown for one2
Memory clock speeds supported by processorKnown for one800,1066 MHz
Memory3 differ
Internal memoryDiffers4 GB2 GB
Maximum internal memoryDiffers96 GB8 GB
Memory slotsKnown for one4x DIMM
Memory channelsDiffersTriple-channelDual-channel
Memory layout (slots x size)Known for one2 x 2 GB
Memory clock speedKnown for one1066 MHz
Storage3 differ
Total storage capacityKnown for one320 GB
HDD interfaceDiffersSerial Attached SCSI (SAS)SATA
HDD speedDiffers15000 RPM7200 RPM
Card reader integratedDiffersYesNo
Number of HDDs installedKnown for one1
HDD capacityKnown for one147 GB
RAID supportKnown for oneYes
RAID levelsKnown for one0, 1, 5, 10
Graphicsidentical
On-board graphics cardKnown for oneYes
Discrete graphics card modelKnown for oneIntel HD
On-board graphics card familyKnown for oneIntel® HD Graphics
On-board graphics card modelKnown for oneIntel® HD Graphics
Number of displays supported (on-board graphics)Known for one2
On-board graphics card base frequencyKnown for one733 MHz
Graphics card familyKnown for oneIntel
Performance1 differ
Product typeDiffersWorkstationPC
Audio output channelsKnown for one5.1 channels
Network1 differ
Ethernet LANKnown for oneYes
Ethernet LAN data ratesKnown for one10,100,1000 Mbit/s
Cabling technologyKnown for one10/100/1000Base-T(X)
Wi-FiKnown for oneNo
Networking featuresDiffersGigabit Ethernet (10/100/1000)Gigabit Ethernet
Ports & interfaces3 differ
USB 2.0 ports quantityDiffers108
DisplayPorts quantityKnown for one1
Ethernet LAN (RJ-45) portsDiffers21
VGA (D-Sub) ports quantityDiffers01
DVI portKnown for oneNo
USB 3.2 Gen 1 (3.1 Gen 1) Type-A ports quantityKnown for one0
Line-inKnown for oneYes
PS/2 ports quantityKnown for one0
Firewire (IEEE 1394) portsKnown for one2
eSATA ports quantityKnown for one1
Serial ports quantityKnown for one1
Parallel ports quantityKnown for one0
Power2 differ
Power supply typeKnown for oneAC
Power requirementsDiffers100-240V, 50/60Hz100-240V
Power supplyDiffers1060 W280 W
Designidentical
Chassis typeKnown for oneTower
External drive baysKnown for one1x 3.5", 3x 5.25"
Internal drive baysKnown for one5x 3.5"
Softwareidentical
Operating system installedKnown for oneWindows 7 Professional
Compatible operating systemsKnown for oneWindows 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.
Display1 differ
Display includedDiffersNoYes
Display diagonalKnown for one55.9 cm (22")
Display resolutionKnown for one1680 x 1050 pixels
Display brightnessKnown for one250 cd/m²
Viewing angle, horizontalKnown for one170°
Viewing angle, verticalKnown for one160°
DisplayKnown for oneLCD
Processor special features10 differ
CPU configuration (max)Differs21
Graphics & IMC lithographyKnown for one45 nm
Intel Demand Based SwitchingDiffersYesNo
Intel Dual Display Capable TechnologyDiffersNoYes
Intel FDI TechnologyDiffersNoYes
Intel Virtualization Technology for Directed I/O (VT-d)DiffersYesNo
Intel® Clear Video HD Technology (Intel® CVT HD)DiffersNoYes
Physical Address Extension (PAE)Differs40 bit36 bit
Processor ARK IDDiffers4020046472
Processor package sizeDiffers42.5 x 45 mm37.5 x 37.5 mm
Supported instruction setsKnown for oneSSE4.2
Intel® Turbo Boost TechnologyDiffers1.0No
Intel® Smart CacheKnown for oneYes
Processor codeKnown for oneSLBFD
Audio1 differ
Audio systemDiffersADI 1988 AHD
Weight & dimensions3 differ
WidthDiffers210 mm275 mm
DepthDiffers602 mm238 mm
HeightDiffers434 mm79 mm
WeightKnown for one24.9 kg
Certificates1 differ
Compliance industry standardsDiffersIEEE 802.3, IEEE 802.3u, IEEE 802.3abIEEE 802.3, 802.3u, 802.3ab
Other featuresidentical
Intel segment taggingKnown for oneEnterprise, Professional
Optical driveidentical
CD read speedKnown for one40x
Expansion slotsidentical
PCI Express x1 slotsKnown for one2
PCI Express x4 slotsKnown for one1
PCI Express x16 slotsKnown for one2
Ergonomicsidentical
Acoustic pressure emissionsKnown for one24 dB

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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