Gigabyte GV-R775OC-1GI AMD Radeon HD 7750 1GB GDDR5  DVI-I / D-SUB / HDMI 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: 880MHz - Memory Clock: 5000MHz Features DVI-I/D-SUB/HDMI outputs with HDCP protection. Minimum Recommended System power supply 450W.