GeForce GTX660 2GB P/N: GTX660-DC2O-2GD5 Manufacturer: Asus US ASUS GeForce GTX 660 DirectCU TOP: 1085MHz TOP overclocked, 20% cooler, 3X quieter TOP-selected 1085MHz cores run 105 MHz higher than reference for smoother gameplay.DirectCU achieves 20% lower temps with twice the dissipation area and 6X greater airflow than conventional design.DIGI+ VRM with Super Alloy Power delivers superior efficiency, reliability, and performance.