G.Skill Ripjaws X Series 16 GB (2 x 8 GB) 240-Pin DDR3 SDRAM Desktop Memory (1600 MHz, PC3 12800) F3-12800CL10D-16GBXL Memory Type: DDR3, Capacity: 16GB (8GBx2), Multi-Channel Kit: Dual Channel Kit Tested Speed: 1600MHz, 	Tested Latency: 10-10-10-30-2N SPD Speed: 1333MHz, SPD Voltage: 1.50v