Lenovo ThinkPad T420 Specs, Performance and Benchmarks

September 29, 2011 by Charles P. Jefferies Reads (466,661)
Editor's Rating

Ratings Breakdown (1-10)

    • Software & Support
    • 8
    • Upgrade Capabilities
    • 8
    • Usability
    • 10
    • Design
    • 8
    • Performance
    • 8
    • Features
    • 8
    • Price/Value Rating
    • 8
    • Total Score:
    • 8.29
    • Rating 1 to 10, top score 10

Our Lenovo ThinkPad T420 review unit has the following specification:

  • 14-inch anti-glare 900p display (1600×900 resolution, 320 nits brightness)
  • Windows 7 Professional 64-bit
  • Intel Core i5-2520M dual-core processor (2.5GHz, up to 3.2GHz Turbo Boost, 3MB cache, 35W TDP)
  • Intel QM67 chipset
  • Nvidia NVS 4200M 1GB dedicated graphics card
  • Automatically switchable to integrated Intel HD graphics via Nvidia Optimus graphics-switching technology
  • 4GB DDR3-1333 RAM (1x 4GB; supports up to 8GB – 2x 4GB)
  • 500GB 7200RPM Hitachi hard drive (HTS725050A9A364)
  • Intel Centrino Advanced-N 6205 wireless card
  • No internal Bluetooth
  • Integrated 720p HD webcam
  • Modular DVD burner
  • One-year limited warranty
  • 9-cell battery (11.1V, 94Wh, 8.4Ah)
  • Weight: 5.34 lbs. w/ 9-cell battery (4.84 w/ 6-cell)
  • Dimensions: 13.4 x 9.05 x 1.18~1.20 inches.
  • Starting price: $849
  • Price as configured: $1,229

Our review unit has a few options, most notably the high-resolution 900p screen, slightly faster Core i5-2520M dual-core processor, a dedicated Nvidia graphics card, 500GB 7200RPM hard drive, and the beefy 9-cell battery. Overall this configuration is more than powerful enough for office productivity and is a good value.

The hard drive in our test sample of the T420 is a fast Hitachi TravelStar model which greatly helps performance – the hard drive/storage system is the slowest part of any modern computer. To that end, the main reason that other business notebooks such as the Dell Latitude E6420 ATG and HP EliteBook 8560p produced significantly higher PCMark scores is because those review units each came equipped with a faster solid state drive (SSD) … which is also an option on the T420.

Performance and Benchmarks
wPrime processor comparison results (lower scores mean better performance):

PCMark05 measures overall system performance (higher scores mean better performance):

PCMark Vantage is a newer benchmark which measures overall system performance (higher scores mean better performance):

3DMark06 measures overall graphics performance for gaming (higher scores mean better performance):

CrystalDiskMark storage drive performance test:



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