Mushkin Enhanced Silverline 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model 996770 Cas Latency: 9 Voltage: 1.5V Multi-channel Kit: Dual Channel Kit Timing: 9-9-9-24 Heat Spreader: Yes Features: Compatible Timings This product is programmed to use timings that offer maximum compatibility with your system and original memory. Compatible Frequency This product is engineered to operate at the optimum frequency for compatibility with your system. Dual Channel Kit Engineered for dual-channel architecture. Stiletto Heatsink This product is equipped with the Stiletto Heatsink.