EVGA GeForce GTX670 FTW 2048MB GDDR5 256bit, Dual Dual-Link DVI, HDMI, DisplayPort, 4-Way SLI Ready Graphics Card Graphics Cards 02G-P4-2678-KR Base Clock: 1006MHz Boost Clock: 1084MHz Memory Clock: 6208MHz Cuda Cores: 1344 PCI-e 3.0, Minimum power supply requirement: 500W,2 6-pin PCI-E power supply connectors required.