Mushkin 996991 DDR3 UDIMM (2x4GB) 8GB PC3-16000 9-11-9-27 RIDGEBACK 1.65V Look great, perform greater. Introducing Ridgeback, a memory cooling solution that offers no compromises. Designed to deliver serious heat transfer performance in an elegant, low-profile design, Ridgeback delivers both the performance you need and the look you want. Ridgeback"s fin array has been carefully engineered to surpass the heat transfer performance of much larger designs. This small footprint improve airflow, keeps your memory modules running cool and clean, and results in a lower total system temperature. * Dual Channel Kit Engineered for dual-channel architecture. * Enhanced Frequency This product has been programmed to operate at the ideal frequency for your system when properly installed. * Enhanced Timings This product has been programmed for timings that offer improved performance when properly installed. * Ridgeback Heatsink This product is equipped with the Ridgeback Heatsink. * Hand-Tested This product has been tested by hand for quality assurance. * Lifetime Warranty Quality guaranteed - we offer a lifetime warranty on this product and genuine, unmatched service and support. Model: 996991 Type: DDR3 Pins: 240 Voltage: 1.65V Speed Spec: PC3-16000 Frequency: 2000MHz Capacity Kit Quantity: Dual Kit Module Density: 4GB Module Config: 512x64 Timings tCL: 9 tRCD: 11 tRP: 9 tRAS: 27 Data Protection Registered: Unbuffered Non-ECC Cooling Technology Heatsink: Ridgeback