8GB KIT (2 x 4GB) for Dell Precision Mobile Workstation Precision M4500 (Dual Core) Covet M6400 M4500. SO-DIMM DDR3 Non-ECC PC3-8500 1066MHz RAM Memory. Genuine A-Tech Brand. at Amazon.com
A-Tech 16GB KIT (2 x 8GB) For Dell Precision Notebook Series Mobile Workstation M4500 Mobile Workstation M4500 (Quad Core) Mobile Workstation M4600 M. SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory at Amazon.com