Gigabyte GTX 980 WINDFORCE 3X 450W OC Edition WINDFORCE 3X 450W cooling system Boost:1304 MHz/ Base: 1203 MHz in OC Mode Boost:1279 MHz/ Base: 1178 MHz in Gaming Mode Integrated with 4GB GDDR5 memory 256-bit memory interface Recommended system power supply requirement: 600W(with two 8-pin external power connectors)