G.SKILL Ripjaws Series 16GB (4 x 4GB) 240-Pin DDR3 1066MHz PC3-8500 Desktop Memory Model F3-8500CL7Q-16GBRL 16GB (4GB x 4) capacity DDR3-1066 (PC3 8500) speed CAS latency: 7-7-7-18 Unbuffered, non-ECC 240-pin DIMM