32GB KIT 4 x 8GB For Dell Precision Notebook Series M4600 M4700 M6600 M6700 M6800 SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory 32GB KIT (4 x 8GB) 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)