G.SKILL RipjawsX Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model F3-10666CL9D-16GBXL F3-10666CL9D-16GBXL. 16GB (2 x 8GB); Dual Channel Kit; DDR3 1333 (PC3 10666); 240-Pin DDR3 SDRAM. Timing: 9-9-9-24; Cas Latency: 9; Voltage: 1.5V. ECC: NO; Buffered/Registered: Unbuffered.