Lenovo ThinkPad T400 (Roll Cage Legend)

Technical Architecture Summary

CPU Family: Intel Core 2 Duo P8400 / P8600 / T9400
Max Graphics TGP: 12W TGP
RAM Upgradability: ✅ Upgradable
Battery / Weight: 84 Wh / 2.13 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 2 Duo P8400 / P8600 / T9400 (Penryn 45nm, 3MB/6MB L2)
CPU Core Configuration: 2-core / 2-thread (2.26 GHz up to 2.53 GHz)
Instruction Set: x86_64
Graphics Subsystem: Switchable Graphics: ATI Mobility Radeon HD 3470 (256MB) / Intel GMA 4500MHD
Max Graphics TGP: 12 Watts
Operating System: Windows XP Professional / Windows Vista Business

02.Memory & Storage Upgradability

RAM Capacity Options: 2 GB / 4 GB / 8 GB DDR3
RAM Technology / Clock: DDR3-1066 MHz SODIMM
Memory Upgradability: Yes (User-Upgradable)
Memory Sockets / Form Factor: 2x SO-DIMM (Upgradable to 8 GB)
Base NVMe Capacity: 160 GB
M.2 Expansion Slots: 1 Slot
Storage Bus & Type: 2.5-inch SATA II (3.0 Gbps) drive bay + Ultrabay Slim hot-swappable secondary drive

03.Display & Color Accuracy

Display Panel Technology: TFT LCD
Screen Diagonal Size: 14.1 inches
Aspect Ratio: 16:10
Native Resolution: 1440 × 900 px (WXGA+ LED backlit display)
Refresh Rate: 60 Hz
Color Gamut Calibration: 60% sRGB
Peak Brightness: 250 nits

04.Chassis, Thermals & Battery

Weight: 2.13 kg (4.7 lbs)
Thickness: 27.6 mm
Chassis Materials: Magnesium-alloy internal Roll Cage structure with carbon-fiber reinforced plastic lid
Thermal Architecture: Copper heatsink with single high-durability quiet fan and intake vents
Battery Capacity: 84 Watt-hours
Bundled Adapter Wattage: 90 W
USB-C Power Delivery Input: Proprietary AC Adapter Only

05.I/O Ports & Wireless Connectivity

Port Complement

3x USB 2.0, VGA D-Sub video port, Gigabit Ethernet RJ-45, Modem RJ-11, IEEE 1394 FireWire 400, ExpressCard/54, 3.5mm mic in & headphone out, ThinkLight keyboard LED

Thunderbolt / USB4

None

HDMI: None (VGA & DisplayPort via optional Advanced Mini Dock)

Card Reader & Audio

None Card Reader

3.5mm Headphone Jack: ✅ Present

Wireless Subsystem

Intel WiFi Link 5100/5300 802.11a/g/n, Bluetooth 2.1, Optional WWAN 3G