GIGABYTE ATI Radeon HD5770 1 GB DDR5 2DVI/HDMI/DisplayPort PCI-Express Video Card GV-R577UD-1GD - Retail Powered by ATI Radeon HD 5770 GPU Integrated with 1024 MB/128-bit GDDR5 video memory Supports DirectX 11 and OpenGL 3.1 Supports ATI Avivo HD & Eyefinity multi-display technology Features Dual dual-link DVI-I/HDMI/Displayport