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Product comparison · 2 pcs/workstations

Lenovo ThinkCentre A51 Pentium 4 630 HT 3.0GHz vs Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz

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  • 78specifications compared
  • 17differ
  • 61identical
  • 32known for one product only

Key differences

The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 10 more processor model than the Lenovo ThinkCentre A51 Pentium 4 630 HT 3.0GHz (640 vs 630). The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 0.2 GHz more processor frequency than the Lenovo ThinkCentre A51 Pentium 4 630 HT 3.0GHz (3.2 GHz vs 3 GHz). The Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has 1 more CPU multiplier (bus/core ratio) than the Lenovo ThinkCentre A51 Pentium 4 630 HT 3.0GHz (16 vs 15). Only the Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz has thermal Monitoring Technologies. Internal memory type: DDR2-SDRAM on the Lenovo ThinkCentre A51 Pentium 4 630 HT 3.0GHz, DDR-SDRAM on the Lenovo ThinkCentre A51 Pentium 4 640 HT 3.2GHz.

  • Processor model
    • 630
    • 640
  • Processor frequency
    • 3 GHz
    • 3.2 GHz
  • CPU multiplier (bus/core ratio)
    • 15
    • 16
  • Internal memory
    • 0.25 GB
    • 0.5 GB
  • Maximum internal memory
    • 4 GB
    • 2 GB
  • Internal memory type
    • DDR2-SDRAM
    • DDR-SDRAM
  • USB 2.0 ports quantity
    • 6
    • 8
  • Power supply
    • 310 W
    • 225 W

Side by side

Differences highlightedShow differences only
110 specifications
A

Lenovo

ThinkCentre A51 Pentium 4 630 HT 3.0GHzView product
B

Lenovo

ThinkCentre A51 Pentium 4 640 HT 3.2GHzView product
Processor3 differ
Processor modelDiffers630640
Processor frequencyDiffers3 GHz3.2 GHz
PCI Express slots versionKnown for one2.0
CPU multiplier (bus/core ratio)Differs1516
Processor core voltage (AC)Known for one1.25 - 1.388 V
Maximum internal memory supported by processorKnown for one32 GB
Memory types supported by processorKnown for oneDDR3-SDRAM
Memory clock speeds supported by processorKnown for one1066 MHz
Memory bandwidth supported by processor (max)Known for one17 GB/s
Processor seriesKnown for oneIntel Pentium 4 600 Series supporting Hyper-Threading Technology
Memory3 differ
Internal memoryDiffers0.25 GB0.5 GB
Maximum internal memoryDiffers4 GB2 GB
Internal memory typeDiffersDDR2-SDRAMDDR-SDRAM
Memory channelsKnown for oneDual-channel
Storageidentical
HDD interfaceKnown for oneSATA
Storage drive typeKnown for oneSATA
Graphicsidentical
On-board graphics cardKnown for oneYes
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 one850 MHz
On-board graphics card dynamic frequency (max)Known for one1100 MHz
Optical driveidentical
CD read speedKnown for one48x
CD write speedKnown for one48x
CD rewrite speedKnown for one32x
Network1 differ
Networking featuresDiffersEthernet/Fast EthernetEthernet/Fast Ethernet/Gigabit Ethernet
Ports & interfaces1 differ
USB 2.0 ports quantityDiffers68
Firewire (IEEE 1394) portsKnown for one0
TV-outKnown for oneNo
Serial ports quantityKnown for one1
Modem (RJ-11) portsKnown for one0
USB 1.1 ports quantityKnown for one0
Power1 differ
Power supplyDiffers310 W225 W
Design1 differ
Chassis typeDiffersDesktopSFF
Softwareidentical
Bundled softwareKnown for oneLotus Notes Stand-alone Client (license), Lotus SmartSuite Millennium (license), Access program, IBM Director Agent (web deliverable), ThinkVantage Client Security Software (web-downloadable), ThinkVantage Rescue and Recovery with Rapid Restore, Norton AntiVirus 2004 OEM Version, PC Doctor diagnosti
Processor special features2 differ
CPU configuration (max)Known for one1
Processor ARK IDDiffers2747827480
Supported instruction setsKnown for oneSSE4.1/4.2
Thermal Monitoring TechnologiesDiffersNoYes
Intel Dual Display Capable TechnologyKnown for oneNo
Intel FDI TechnologyKnown for oneNo
Intel Fast Memory AccessKnown for oneNo
Intel Flex Memory AccessKnown for oneNo
Intel VT-x with Extended Page Tables (EPT)Known for oneNo
Weight & dimensions4 differ
WidthDiffers442 mm309 mm
DepthDiffers401 mm359 mm
HeightDiffers146 mm85 mm
WeightDiffers14 kg8.5 kg
Other features1 differ
Security featuresDiffers-Parallel port I/O control -Configuration password -Diskette boot inhibit -Diskette I/O control -Hardfile I/O control -Boot sequence control -Boot without keyboard or mouse -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control -U-Bolt anchoring feature-Boot without keyboard or mouse -Configuration password -Diskette Boot inhibit -Diskette I/O control -Hard disk drive password -Hard drive I/O control -Parallel port I/O control -Power on password -Security slot (for attachment of optional cable lock) -Serial port I/O control -U-Bolt anchoring featu

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