4GB Memory RAM for Dell Precision Laptop M6400, M6400 Covet Mobile Workstation, M6400 Mobile Workstation, M6600, M6500 204pin PC3-8500 1066MHz DDR3 SO-DIMM Black Diamond Memory Module Upgrade - Newegg.com
Dell Precision M6400 Covet review
Laptop, Dell Precision M6400, Core 2 Duo T9550 2.66Ghz Processor, 4Gb Ram, No Hdd, Dvd-Rw, Vista Business Licence Sticker, With Charger, Appears To Function [91190+39]
4GB Memory RAM Upgrade for the Dell Precision M6400 DDR3 Laptops | eBay
Dell Precision M6400 Specifications - Notebooks - Performance - PC World Australia