GIGABYTE GV-N670OC-2GD GeForce GTX 670 Windforce OC 2048MB GDDR5 256-bit PCI Express 3.0 x16 HDCP Ready SLI Support Graphics Card Powered by nVidia GeForce GTX 670 GPU Integrated with the first 2048MB GDDR5 memory and 256-bit memory interface Features Dual link DVI-I/ DVI-D/ HDMI/ DisplayPort with HDCP protection Base clock - 980 MHz; boost clock - 1058 MHz 9.System power supply requirement - 550W