Lenovo ThinkPad T14 Gen 6 (AMD) vs Lenovo ThinkPad T400

Every spec side by side, from each maker's published figures.

Only show differences

Better figure, where one is clearly better

Share comparison

ThinkPad T14 Gen 6 (AMD) compared with ThinkPad T400

	LenovoThinkPad T14 Gen 6 (AMD)	LenovoThinkPad T400
Overview
Released
Released	May 2025	August 2008
Display
Screen size
Screen size	14″	14.1″
Resolution
Resolution	1920 × 1200 or 2880 × 1800 (better)	1280 × 800
Panel
Panel	IPS LCD or OLED	–
Refresh rate
Refresh rate	60 Hz or 120 Hz	–
Brightness
Brightness	400 nits or 500 nits (better)	185 nits
Touchscreen
Touchscreen	No or Yes	No
Display type
Display type	WUXGA IPS (400-nit non-touch or on-cell touch, 500-nit low power, or 500-nit on-cell touch with ThinkPad Privacy Guard) or 2.8K OLED with add-on film touch, all 16:10	14.1-inch WXGA or WXGA+ LCD; CCFL and LED options; listed configurations use the 185-nit WXGA CCFL panel
Colour range
Colour range	45% NTSC (400-nit IPS); 100% sRGB (500-nit IPS); 100% DCI-P3 (OLED)	–
Screen finish
Screen finish	Anti-glare (IPS); anti-glare, anti-reflection and anti-smudge (OLED)	Anti-glare
Display features
Display features	IPS 1,000:1 contrast (1,500:1 with Privacy Guard); OLED 100,000:1 contrast, 120 Hz VRR, DisplayHDR True Black 500 and Dolby Vision; 3M DBEF5 on the 400-nit panels; Eyesafe Certified 2.0; 85.73% screen-to-body ratio	–
Performance
Processor
Processor	AMD Ryzen AI 5 PRO 340 or AMD Ryzen AI 7 PRO 350	Intel Core 2 Duo P8400 or Intel Core 2 Duo P8600
CPU cores
CPU cores	6 or 8	2
CPU threads
CPU threads	12 or 16	–
Graphics
Graphics	Radeon 840M Graphics or Radeon 860M Graphics	Intel Graphics Media Accelerator 4500MHD
AI engine (NPU)
AI engine (NPU)	50 TOPS	–
Memory
Memory	16 GB, 32 GB or 64 GB (better)	2 GB
Storage
Storage	512 GB to 1 TB (better)	128 GB to 160 GB
CPU
CPU	Ryzen AI 5 PRO 340 (6 cores, 12 threads) or Ryzen AI 7 PRO 350 (8 cores, 16 threads)	Intel Core 2 Duo with 1066 MHz front-side bus; listed configurations are factory 7417-T1U and 7417-PAU
GPU
GPU	Integrated AMD Radeon 840M or 860M, shared memory, DirectX 12	Intel GMA 4500MHD in the GM45 chipset on listed configurations; optional ATI Mobility Radeon HD 3470 with switchable graphics on other models
AI engine
AI engine	Copilot+ PC; NPU up to 50 TOPS	–
Memory type
Memory type	DDR5-5600 in two SODIMM slots, dual-channel, up to 64 GB	DDR3-1066 PC3-8500; two SO-DIMM sockets, up to 8 GB
Storage type
Storage type	One M.2 2280 PCIe 4.0 x4 slot; NVMe SSD up to 2 TB, Opal 2.0	Removable 2.5-inch SATA HDD or 1.8-inch SATA SSD; listed configurations have 160 GB 5400 rpm HDD and 128 GB SSD respectively; optional second disk in Ultrabay
Battery and size
Battery life (maker's claim)
Battery life (maker's claim)	Up to 22.9 hours	Up to 6.5 hours
Battery capacity
Battery capacity	57 Wh	–
Weight
Weight	1.38 kg (better)	2.3 kg
Thickness
Thickness	16.13 mm (better)	32 mm
Width × depth
Width × depth	315.9 × 223.7 mm	335.5 × 270 mm
Battery life detail
Battery life detail	52.5 Wh or 57 Wh Li-ion; Ryzen AI 7 PRO 350 with 57 Wh and low-power WUXGA, MobileMark 25 up to 15.5 hr, JEITA 3.0 up to 12.8 hr video and 25.7 hr idle, local video up to 22.9 hr; Ryzen AI 5 PRO 340 with 52.5 Wh and WUXGA touch, local video up to 15.7 hr	Four-, six- or nine-cell removable battery; six-cell up to 6.5 hours, six-cell plus Ultrabay battery up to 8 hours, nine-cell up to 9.8 hours; dimensions and starting weight shown with six-cell battery
Charger
Charger	65 W USB-C (PD 3.0) adapter, including nano GaN and slim GaN versions; offerings vary by country	65 W adapter with integrated graphics; 90 W for discrete graphics
Fast charging
Fast charging	Rapid Charge to 80% in 1 hour (when off, in standby or hibernating)	–
Materials
Materials	Black models, PC with 20% carbon fibre top and bottom; grey models, aluminium top and PC with 20% carbon fibre bottom	Super-Elastic PolyCarbonate lid, carbon-fibre reinforced plastic bottom and magnesium roll cages
Colours
Colours	Black; Grey	Black
Connections
Ports
Ports	2 × Thunderbolt 4, 2 × USB-A, HDMI, Ethernet, headphone jack	3 × USB-A, Ethernet, headphone jack
Wi-Fi
Wi-Fi	Wi-Fi 7	802.11a/b/g/n; optional WiMAX
Bluetooth
Bluetooth	5.4	Optional Bluetooth 2.1
Webcam
Webcam	5MP, optional IR	Optional 1.3-megapixel fixed-focus camera
Operating system
Operating system	Windows	Windows
Port detail
Port detail	2 × USB-C (Thunderbolt 4 / USB4 40 Gbps) with USB PD 15–65 W and DisplayPort 2.1; 2 × USB-A 5 Gbps (one Always On); HDMI 2.1 up to 4K 60 Hz; Gigabit Ethernet (RJ-45); 3.5 mm headphone/mic combo jack; optional smart card reader and nano-SIM slot (4G or 5G models)	Three USB 2.0, VGA, Gigabit Ethernet, RJ-11 modem, FireWire 400, separate microphone and headphone jacks, ExpressCard/54 and docking connector; PC Card and seven-format card reader vary by model
External displays
External displays	Up to three external displays (four including the built-in); USB-C up to 8K 30 Hz, HDMI up to 4K 60 Hz	VGA up to 2048 × 1536 at 75 Hz; DVI pass-through via compatible optional dock
Keyboard
Keyboard	6-row, spill-resistant, backlit or non-backlit; 1.5 mm key travel (1.35 mm on Fn row and G/H/B); Copilot key; TrackPoint	89-key spill-resistant keyboard; ThinkLight illuminates the keys
Trackpad
Trackpad	Mylar 3-button trackpad, 60 × 115 mm	UltraNav touchpad and TrackPoint with separate buttons
Speakers
Speakers	Stereo 2 W × 2, Dolby Audio	Stereo speakers, 1 W
Microphones
Microphones	Dual-microphone array, 360° far-field, Dolby Voice	Digital microphone
Biometrics
Biometrics	Optional fingerprint reader in the power button (match-on-chip); optional IR camera for Windows Hello	Optional swipe fingerprint reader; TPM 1.2