ThinkPad Laptop T Series Intel Core 2 Duo T9600 (2.80GHz) 2GB Memory 160GB HDD ATI Mobility Radeon HD 3470 and Intel GMA 4500MHD 14.1" Windows Vista Business 64-bit T400 (2767R2U) Laptops /
CMS 8GB (2X4GB) DDR3 8500 1066MHZ Non ECC SODIMM Memory Ram Upgrade Compatible with Lenovo® Thinkpad T400 2764, 2765, 2766, 2767, 2768 - A35 at Amazon.com
memory - Does Lenovo T400 can only work with up to 4GB RAM? - Super User