Mushkin Enhanced ECO2 8GB (2 x 4GB) 240-Pin DDR3 SDRAM DDR3L 1600 (PC3L 12800) Memory Model 996988E Cas Latency: 9 Voltage: 1.35V Multi-channel Kit: Dual Channel Kit Timing: 9-9-9-24 Buffered/Registered: Unbuffered Heat Spreader: ECO-blk/slv Features: Enhanced Timings This product has been programmed for timings that offer improved performance when properly installed. Enhanced Frequency This product has been programmed to operate at the ideal frequency for your system when properly installed. Hand-Tested This product has been tested by hand for quality assurance. Extreme Performance Unparalleled speeds to save time and money while transferring content rich data. ECO Heatsink This product is equipped with the ECO Heatsink.