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Product comparison · 2 pcs/workstations

Lenovo A70 + ThinkVision L1951P vs Lenovo D20 (4155-22G)

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  • 86specifications compared
  • 47differ
  • 39identical
  • 54known for one product only

Key differences

  • Processor family
    • Intel® Core™2 Duo
    • Intel® Xeon® 5000 Sequence
  • Processor model
    • E7500
    • E5520
  • Processor cores
    • 2
    • 4
  • Processor threads
    • 2
    • 8
  • Processor frequency
    • 2.93 GHz
    • 2.26 GHz
  • Processor cache
    • 3 MB
    • 8 MB
  • Processor cache type
    • L2
    • Smart Cache
  • Bus type
    • FSB
    • QPI

Side by side

Differences highlightedShow differences only
140 specifications
A

Lenovo

A70 + ThinkVision L1951PView product
B

Lenovo

D20 (4155-22G)View product
Processor18 differ
Processor familyDiffersIntel® Core™2 DuoIntel® Xeon® 5000 Sequence
Processor modelDiffersE7500E5520
Processor coresDiffers24
Processor threadsDiffers28
Processor boost frequencyKnown for one2.53 GHz
Processor frequencyDiffers2.93 GHz2.26 GHz
Processor cacheDiffers3 MB8 MB
Processor cache typeDiffersL2Smart Cache
Bus typeDiffersFSBQPI
System bus rateKnown for one5.86 GT/s
Processor seriesDiffersIntel Core 2 Duo E7000 SeriesIntel Xeon 5500 Series
Processor codenameDiffersWolfdaleNehalem EP
Processor system typeKnown for oneDP
Thermal Design Power (TDP)Differs65 W80 W
TcaseDiffers74.1 °C72 °C
Number of QPI linksKnown for one2
Processor socketDiffersLGA 775 (Socket T)Socket B (LGA 1366)
Number of Processing Die TransistorsDiffers228 M731 M
Processing Die sizeDiffers82 mm²263 mm²
CPU multiplier (bus/core ratio)Differs1117
SteppingDiffersR0D0
Maximum internal memory supported by processorKnown for one144 GB
Memory types supported by processorKnown for oneDDR3-SDRAM
Memory clock speeds supported by processorKnown for one800,1066 MHz
Memory bandwidth supported by processor (max)Known for one25.6 GB/s
ECC supported by processorDiffersNoYes
Processor front side busKnown for one1066 MHz
Memory2 differ
Internal memoryDiffers2 GB4 GB
Maximum internal memoryDiffers4 GB96 GB
Memory layout (slots x size)Known for one2 x 2 GB
Memory channelsKnown for oneTriple-channel
Memory slotsKnown for one2x DIMM
Storage2 differ
HDD capacityKnown for one147 GB
HDD interfaceDiffersSATASerial Attached SCSI (SAS)
HDD speedDiffers7200 RPM15000 RPM
Card reader integratedKnown for oneYes
RAID supportKnown for oneYes
RAID levelsKnown for one0, 1, 5, 10
Total storage capacityKnown for one320 GB
Performance1 differ
Product typeDiffersPCWorkstation
Optical driveidentical
CD read speedKnown for one40x
Networkidentical
Networking featuresKnown for oneGigabit Ethernet (10/100/1000)
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
Ports & interfaces4 differ
USB 2.0 ports quantityDiffers810
Ethernet LAN (RJ-45) portsDiffers12
Line-inKnown for oneYes
VGA (D-Sub) ports quantityDiffers10
PS/2 ports quantityKnown for one0
Firewire (IEEE 1394) portsDiffers12
eSATA ports quantityKnown for one1
HDMI ports quantityKnown for one0
DVI portKnown for oneNo
Expansion slots2 differ
PCI Express x1 slotsDiffers12
PCI Express x4 slotsKnown for one1
PCI Express x16 slotsDiffers12
Number of 3.5" baysKnown for one2
PCI slotsKnown for one2
Power2 differ
Power requirementsDiffers110/220V, 50/60Hz100-240V, 50/60Hz
Power supplyDiffers180 W1060 W
Designidentical
External drive baysKnown for one1x 3.5", 3x 5.25"
Internal drive baysKnown for one5x 3.5"
Number of 5.25" baysKnown for one1
Softwareidentical
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.
Operating system installedKnown for oneWindows 7 Professional
Operating system architectureKnown for one32-bit
Display1 differ
Display includedDiffersYesNo
Display diagonalKnown for one48.3 cm (19")
Display resolutionKnown for one1440 x 900 pixels
Native aspect ratioKnown for one16:10
Contrast ratio (typical)Known for one1000:1
Display brightnessKnown for one250 cd/m²
Viewing angle, horizontalKnown for one170°
Viewing angle, verticalKnown for one160°
DisplayKnown for oneTFT
Processor special features10 differ
CPU configuration (max)Known for one2
Intel Demand Based SwitchingDiffersNoYes
Intel VT-x with Extended Page Tables (EPT)DiffersNoYes
Intel Virtualization Technology (VT-x)Differs2Yes
Intel Virtualization Technology for Directed I/O (VT-d)DiffersNoYes
Intel® Smart CacheKnown for oneYes
Physical Address Extension (PAE)Known for one40 bit
Processor ARK IDDiffers3650340200
Processor codeDiffersSLB9ZSLBFD
Processor package sizeDiffers37.5 x 37.5 mm42.5 x 45 mm
Thermal Monitoring TechnologiesDiffersYesNo
Intel® Turbo Boost TechnologyDiffersNo1.0
Intel® Hyper Threading Technology (Intel® HT Technology)DiffersNoYes
Audio1 differ
Audio systemDiffersHDADI 1988 A
Ergonomicsidentical
Acoustic pressure emissionsKnown for one24 dB
Weight & dimensions4 differ
WidthDiffers160 mm210 mm
DepthDiffers355 mm602 mm
HeightDiffers392 mm434 mm
WeightDiffers10.5 kg24.9 kg
Certificatesidentical
Compliance industry standardsKnown for oneIEEE 802.3, IEEE 802.3u, IEEE 802.3ab
Graphicsidentical
On-board graphics cardKnown for oneYes
Discrete graphics card modelKnown for oneIntel® GMA X4500
Graphics card familyKnown for oneIntel
Other featuresidentical
HDD user passwordKnown for oneYes

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