AMD Radeon Memory Entertainment Series 4GB 240-Pin DDR3 1600 (PC3 12800) CL9 1.5V Unbuffered Internal Memory Module AE34G1609U1 DDR3 1600 (PC3 12800) Timing 9-9-9-28 Cas Latency 9 Voltage 1.5V Compatible with AMD and Intel processors Low-profile heat spreader Lifetime warranty and free technical support