Gigabyte GeForce GTX 660 OC 2GB GDDR5 PCI-Express 3.0 DVI-I/DVI-D/HDMI/Displayport SLI Ready Graphics Card GV-N660OC-2GD Ultra Durable VGA - GPU Temperature 5% ~ 10% down - Overclocking capability 10% ~ 30% up - Power Switch Loss 10% ~ 30% down WINDFORCE 2X Anti-turbulence cooling solution w/ Triangle Cool technology Core Clock: 1033MHz (Base) 1098MHz (Boost) - Memory Clock: 6008MHz Features DVI-I / DVI-D / HDMI / Displayport outputs with HDCP protection Recommended minimum system PSU 450W with two 6-pin PCI-E power connectors Supports NVIDIA SLI / 3D Vision / Surround / CUDA / PhysX technology