Gigabyte GV-R777OC-1GD AMD Radeon HD 7770 1GB GDDR5  DVI-I / HDMI / 2x mini-Displayport PCI-Express 3.0 Graphic Card Gigabyte Ultra Durable 2 Components - Ultra Cooling Low RDS(on) MOSFET Design - Low Power Loss Ferrite Core Chokes - Longer Life All-Solid Capacitor Design Gigabyte Custom-Designed 100mm Fansink for maximum cooling efficiency and whisper silent operation. Core Clock: 1100MHz - Memory Clock: 5000MHz Features DVI-I/HDMI/2x mini-Displayport outputs with HDCP protection. Supports AMD Eyefinity/EyeSpeed/CrossFire/Avivo HD technologies. Minimum Recommended System power supply 450W.