8GB STICK For Dell Precision Notebook Series Mobile Workstation M4600 Mobile Workstation M4700 (2 Slots) Mobile Workstation M4700 (4 Slots) Mobile Workstation M6600 (2 Slots) Mobile Workstation M6600 (4 Slots) Mobile Workstation M6700 (2 Slots) Mobile Workstation M6700 (4 Slots) Mobile Workstation M6800 (2 Slots) Mobile Workstation M6800 (4 Slots). SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine A-Tech Brand. 8GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Dell Precision Notebook Series. (See Compatibility List Below)