parts-quick 4GB Memory for Dell Precision M4400 Mobile Workstation DDR2 PC2-6400 800MHz Laptop SODIMM Compatible RAM at Amazon.com
8GB KIT (2 x 4GB) for Dell Precision Workstation Precision M2400 Precision M4400 Precision M6300. SO-DIMM DDR2 Non-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
4GB Team High Performance Memory RAM Upgrade Single Stick For Dell Precision M2400 M4400 M6300. The Memory Kit comes with Life Time Warranty. at Amazon.com