Mushkin 996946 DDR3 UDIMM (2x2GB) 4GB PC3-12800 9-9-9-24 STILETTO 1.5-1.6V Upgrade to high performance and cut down the heat! The Stiletto heatsink by Mushkin Enhanced allows for an upgrade to better performance without a huge investment. Achieve faster and fresher response, increased stability, and an overall more enjoyable performance from your system by installing modules equipped with Stiletto. Compatible Frequency This product is engineered to operate at the optimum frequency for compatibility with your system. Compatible Timings This product is programmed to use timings that offer maximum compatibility with your system and original memory. Dual Channel Kit Engineered for dual-channel architecture. Lifetime Warranty Quality guaranteed - we offer a lifetime warranty on this product and genuine, unmatched service and support. Stiletto Heatsink This product is equipped with the Stiletto Heatsink. Type: DDR3 Voltage: 1.55V Speed Spec: PC3-12800 Frequency: 1600MHz Capacity Kit Type: Dual Kit Module Size: 2GB Timings tCL: 9 tRCD: 9 tRP: 9 tRAS: 24 Cooling Technology Heatsink: Stiletto