Gigabyte R7 250 GDDR5-2GB DVI-D/D-SUB/HDMI OC Graphics Cards GV-R725O5-2GI Ultra Durable 2 Series OC Edition - Core Clock: 1100 MHz (Std 1050 MHz) Features Single-Link DVI-D / HDMI / D-Sub Support PCI Express 3.0 x8 bus interface System power supply requirement: 400W Supports AMD HD3D / Catalyst / GCN Architechture