IBM ThinkPad T42 vs Lenovo ThinkPad T400

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ThinkPad T42 compared with ThinkPad T400

	IBMThinkPad T42	LenovoThinkPad T400
Overview
Released
Released	May 2004	August 2008
Display
Screen size
Screen size	14.1″	14.1″
Resolution
Resolution	1400 × 1050 (better)	1280 × 800
Brightness
Brightness	150 nits	185 nits (better)
Touchscreen
Touchscreen	No	No
Display type
Display type	Listed US 2373-3UU has 14.1-inch active-matrix TFT SXGA+ LCD, 150 nits; native refresh and panel subtype unpublished. Other original models offered 14.1-inch XGA, or a separate 15-inch chassis	14.1-inch WXGA or WXGA+ LCD; CCFL and LED options; listed configurations use the 185-nit WXGA CCFL panel
Screen finish
Screen finish	–	Anti-glare
Performance
Processor
Processor	Intel Pentium M 735	Intel Core 2 Duo P8400 or Intel Core 2 Duo P8600
CPU cores
CPU cores	1	2
CPU threads
CPU threads	1	–
Graphics
Graphics	ATI Mobility Radeon 9600	Intel Graphics Media Accelerator 4500MHD
Memory
Memory	512 MB	2 GB (better)
Storage
Storage	40 GB	128 GB to 160 GB (better)
CPU
CPU	Listed Pentium M 735 at 1.7 GHz, 400 MHz system bus and 2 MB on-die ECC L2 cache; other original configurations used Pentium M 745 at 1.8 GHz	Intel Core 2 Duo with 1066 MHz front-side bus; listed configurations are factory 7417-T1U and 7417-PAU
GPU
GPU	Listed ATI Mobility Radeon 9600, AGP 4X with 64 MB DDR graphics memory; XGA configurations instead offered Radeon 7500 with 32 MB	Intel GMA 4500MHD in the GM45 chipset on listed configurations; optional ATI Mobility Radeon HD 3470 with switchable graphics on other models
Memory type
Memory type	Listed 512 MB PC2700 DDR-333 CL2.5 in one socket; two 200-pin SO-DIMM sockets and 2 GB maker maximum	DDR3-1066 PC3-8500; two SO-DIMM sockets, up to 8 GB
Storage type
Storage type	Listed 40 GB 5400 rpm Enhanced IDE removable hard drive, 9.5 mm high, with Active Protection System; DVD-ROM/CD-RW combo in removable 9.5 mm Ultrabay Slim. Other configurations had DVD-ROM, DVD writer or 80 GB disk	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 4.6 hours	Up to 6.5 hours
Weight
Weight	2.3 kg	2.3 kg
Thickness
Thickness	31.4 mm (better)	32 mm
Width × depth
Width × depth	311 × 255 mm	335.5 × 270 mm
Battery life detail
Battery life detail	Six-cell lithium-ion battery, maker maximum 4.6 hours; optional nine-cell up to 7.5 hours, or nine-cell plus Ultrabay Slim battery up to 9.5 hours. Headline 2.3 kg is SXGA+ model weight including optical drive and battery; XGA models are 2.2 kg. Height spans 26.6–31.4 mm, maximum listed	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	Universal 72 W AC adapter	65 W adapter with integrated graphics; 90 W for discrete graphics
Materials
Materials	–	Super-Elastic PolyCarbonate lid, carbon-fibre reinforced plastic bottom and magnesium roll cages
Colours
Colours	Black	Black
Connections
Ports
Ports	2 × USB-A, Ethernet, headphone jack	3 × USB-A, Ethernet, headphone jack
Wi-Fi
Wi-Fi	802.11a/b/g, Atheros AR5001X+ on listed US 2373-3UU	802.11a/b/g/n; optional WiMAX
Bluetooth
Bluetooth	Bluetooth, version unpublished in original PSREF	Optional Bluetooth 2.1
Webcam
Webcam	No built-in webcam listed	Optional 1.3-megapixel fixed-focus camera
Operating system
Operating system	Windows	Windows
Port detail
Port detail	Two USB 2.0, Gigabit RJ-45, parallel, VGA, 4 Mbps infrared, RJ-11 modem, S-video, separate microphone/headphone jacks; two Type I/II or one Type III CardBus PC Card slots. Docking accessories optional	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	–	VGA up to 2048 × 1536 at 75 Hz; DVI pass-through via compatible optional dock
Keyboard
Keyboard	87-key keyboard with Access IBM button, 19 mm pitch and 2.5 mm travel; ThinkLight keyboard illumination	89-key spill-resistant keyboard; ThinkLight illuminates the keys
Trackpad
Trackpad	UltraNav touchpad and TrackPoint with Press-to-Select, scrolling and magnifying glass	UltraNav touchpad and TrackPoint with separate buttons
Speakers
Speakers	Stereo 1 W speakers with dedicated volume and mute buttons	Stereo speakers, 1 W
Microphones
Microphones	Internal microphone and separate microphone input	Digital microphone
Biometrics
Biometrics	IBM Embedded Security Subsystem 2.0, TCG compliant; power-on, supervisor and hard-drive passwords. Original listed May2004 configuration does not include the later fingerprint-reader revision	Optional swipe fingerprint reader; TPM 1.2