ASUS GTX 660 Ti Series Graphics Card Overclocked Edition Graphics Cards GTX660 TI-DC2O-2GD5 TOP-selected 1058MHz core - 78MHz higher than reference for smoother gameplay. DirectCU thermal design utilizes direct contact copper heatpipes so heat is dissipated efficiently, delivering a 20% cooler and vastly quieter performance than reference. GPU Tweak utility helps you modify and tune clock speeds, voltages, and fan performance via an intuitive interface. Acclaimed DIGI+ VRM with Super Alloy Power technology delivers precise digital power and enhanced durability for stable overclocking and smooth gaming.