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Product comparison · 2 laptops

Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US vs Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP

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  • 31specifications compared
  • 9differ
  • 22identical
  • 7known for one product only

Key differences

The Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US has 0.1 GHz more processor frequency than the Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP (1.7 GHz vs 1.6 GHz). The Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US has 0.25 GB more internal memory than the Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP (0.5 GB vs 0.25 GB). The Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US has 1.1 h more battery life (max) than the Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP (5.1 h vs 4 h). Display diagonal: 35.8 cm (14.1") on the Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US, 38.1 cm (15") on the Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP. Discrete graphics card model: AMD Mobility Radeon 7500 on the Lenovo IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP US, AMD Mobility Radeon 9000 IGP on the Lenovo ThinkPad R51 PM725 1600 256MB 40GB WXP.

  • Display diagonal
    • 35.8 cm (14.1")
    • 38.1 cm (15")
  • Processor frequency
    • 1.7 GHz
    • 1.6 GHz
  • Internal memory
    • 0.5 GB
    • 0.25 GB
  • Discrete graphics card model
    • AMD Mobility Radeon 7500
    • AMD Mobility Radeon 9000 IGP
  • Battery life (max)
    • 5.1 h
    • 4 h
  • Weight
    • 2 kg
    • 2.6 kg
  • Dimensions (WxDxH)
    • 311 x 255 x 27 mm
    • 314 x 260 x 37 mm

Side by side

Differences highlightedShow differences only
38 specifications
A

Lenovo

IBM THINKPAD T42 P M-1.7(735) CENT. 512/40G/14/DVD/CDRW/WXP USView product
B

Lenovo

ThinkPad R51 PM725 1600 256MB 40GB WXPView product
Display1 differ
Display diagonalDiffers35.8 cm (14.1")38.1 cm (15")
Display resolution1024 x 768 pixels1024 x 768 pixels
Native aspect ratio4:34:3
Contrast ratio (typical)Known for one750:1
Processor1 differ
Processor manufacturerIntelIntel
Processor frequencyDiffers1.7 GHz1.6 GHz
Processor front side bus400 MHz400 MHz
Memory1 differ
Internal memoryDiffers0.5 GB0.25 GB
Storageidentical
Total storage capacity40 GB40 GB
HDD speedKnown for one5400 RPM
Optical drive typeKnown for oneDVD-ROM
Graphics1 differ
Discrete graphics cardYesYes
Discrete graphics card modelDiffersAMD Mobility Radeon 7500AMD Mobility Radeon 9000 IGP
Maximum graphics card memory0.032 GB0.032 GB
Maximum resolution2048 x 1536 pixels2048 x 1536 pixels
Graphics card interfaceAGP 4XAGP 4X
Audioidentical
Audio systemKnown for onestereo
Number of built-in speakers22
Optical driveidentical
CD read speed24x24x
CD write speed24x24x
CD rewrite speed24x24x
DVD read speed8x8x
Networkidentical
Networking featuresEthernet/Fast Ethernet/Gigabit Ethernet/IEEE 802.11b/IEEE 802.11g/BluetoothEthernet/Fast Ethernet/Gigabit Ethernet/IEEE 802.11b/IEEE 802.11g/Bluetooth
Ports & interfaces1 differ
I/O portsDiffers-Infrared -Parallel -Expansion Bus port (for Dock II/Mini Dock or Port Replicator II) -External microphone -External Display -Headphone/Line out -AC adapter -RJ-11 -RJ-45 -S-Video out -2 USB 2.0-External Display -Headphone/Line out -Infrared -Parallel -RJ-11 -RJ-45 -S-Video out -2 USB 2.0 -External microphone -AC adapter -Expansion Bus port (for Dock II/Mini Dock or Port Replicator II)
Keyboardidentical
Keyboard typeFull sizeFull size
Softwareidentical
Bundled softwareKnown for oneAccess IBM, IBM Access Connections, IBM Client Security Software (web-downloadable), IBM Drive Letter Access by Sonic, IBM Record Now, IBM Rescue and Recovery with Rapid Restore, Norton AntiVirus 2004 with 90 days of virus definition upgrades, PC-Doctor, IBM fingerprint software, InterVideo WinDVD C
Compatible operating systemsMicrosoft Windows XP ProfessionalMicrosoft Windows XP Professional
Battery1 differ
Battery life (max)Differs5.1 h4 h
Weight & dimensions2 differ
WeightDiffers2 kg2.6 kg
Dimensions (WxDxH)Differs311 x 255 x 27 mm314 x 260 x 37 mm
WidthKnown for one314 mm
DepthKnown for one260 mm
Hard driveidentical
Storage drive typeATA-100 (Enhanced IDE)ATA-100 (Enhanced IDE)
Other features1 differ
Security featuresDiffers-IBM Security Slot -Power-on password -Supervisor password -Hard disk drive password -Integrated fingerprint reader -IBM Embedded Security Subsystem 2.0-Hard disk drive password -IBM Embedded Security Subsystem 2.0 -IBM Security Slot -Power-on password -Supervisor password
Battery type6 Cell Lithium-Ion6 Cell Lithium-Ion
Internal modemYesYes
Modem speed56 Kbit/s56 Kbit/s
Supplied AC adapter typeACAC

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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