Lenovo ThinkPad T420 (Classic 7-Row Keyboard)

Technical Architecture Summary

CPU Family: Intel Core i5-2520M / Core i7-2640M
Max Graphics TGP: 15W TGP
RAM Upgradability: ✅ Upgradable
Battery / Weight: 94 Wh / 2.24 kg

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Comprehensive Hardware Specification Matrix

Direct engineering breakdown categorized by compute, display, thermal envelope, I/O, and chassis acoustics.

01.Platform & Compute Architecture

Processor / SoC: Intel Core i5-2520M / Core i7-2640M (Sandy Bridge 32nm)
CPU Core Configuration: 2-core / 4-thread (2.5 GHz base, 3.2 GHz Turbo Boost)
Instruction Set: x86_64
Graphics Subsystem: NVIDIA NVS 4200M (1GB Optimus) / Intel HD Graphics 3000
Max Graphics TGP: 15 Watts
Operating System: Windows 7 Professional

02.Memory & Storage Upgradability

RAM Capacity Options: 4 GB / 8 GB / 16 GB DDR3
RAM Technology / Clock: DDR3-1333 MHz SODIMM
Memory Upgradability: Yes (User-Upgradable)
Memory Sockets / Form Factor: 2x SO-DIMM (Upgradable to 16 GB)
Base NVMe Capacity: 320 GB
M.2 Expansion Slots: 1 Slot
Storage Bus & Type: 2.5-inch SATA III bay + internal mSATA slot in WWAN slot

03.Display & Color Accuracy

Display Panel Technology: TFT LCD
Screen Diagonal Size: 14 inches
Aspect Ratio: 16:9
Native Resolution: 1600 × 900 px (HD+ Anti-glare)
Refresh Rate: 60 Hz
Color Gamut Calibration: 65% sRGB
Peak Brightness: 220 nits

04.Chassis, Thermals & Battery

Weight: 2.24 kg (4.9 lbs)
Thickness: 30.5 mm
Chassis Materials: Magnesium Roll Cage base with titanium composite top cover, classic 7-row tactile keyboard
Thermal Architecture: Enhanced Owl-wing fin fan with copper heatpipe module
Battery Capacity: 94 Watt-hours
Bundled Adapter Wattage: 90 W
USB-C Power Delivery Input: Proprietary AC Adapter Only