Gigabyte GTX660 GDDR5-2GB 2xDVI/HDMI/DP Graphics Card GV-N660WF2-2GD REV2 WINDFORCE 2X Cooling system Features Dual-link DVI-I / DVI-D / HDMI / DisplayPort Core Clock: Base / Boost clock980 / 1046 MHz System power supply requirement: 450W