GIGABYTE ATI Radeon HD6770 1 GB DDR5 DVI/HDMI/DisplayPort PCI-Express Video Card GV-R677SL-1GD Gigabyte Ultra Durable VGA Series - GPU Temperature 5% ~ 10% down - Overclocking capability 10% ~ 30% up - Power Switching Loss 10% ~ 30% down GIGABYTE Silent Cell 0dB Passive Cooling Solution Gold plated HDMI for optimum signal transfer between connections Features DVI-I / HDMI / Displayport outputs with HDCP protection Core Clock: 850MHz - Memory Clock: 4800MHz Supports AMD Eyefinity / EyeSpeed / CrossFire / Avivo HD technologies Recommended minimum Power Supply 450W with one 6-pin PCI-E power connector