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]
8GB (4x2GB) RAM Memory for Dell Precision Mobile Workstation M6400 PC3-8500S | eBay
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Dell Precision M6400 Covet review
Amazon.com: 4GB DDR3-1333 RAM Memory Upgrade for The Dell Precision M6400 N- : Electronics
Dell Precision M6400 Covet review
Upgrading my m6400 for max performance! | Overclock.net