Full Details from Amazon.com : http://www.amazon.com/gp/product/B00HWQUXJ8?tag=onigi-20

AMD Radeon Memory AMD Radeon R9 Gamer Series Memory 8GB (2x4GB) 240-Pin DDR3 2133 (PC3 17000)

DDR3 2133 PC3 17000
Timing 10-11-11-30
CAS Latency 10
Voltage 165V
Compatible with AMD and Intel processors
Low-profile high-purity aluminum heat spreader