Diamond Multimedia ATI AMD Radeon HD 5450 PCI Express GDDR3 1GB Video Graphics Card 5450PE31G GPU: Cedar PCI Express 2.1 x16 bus interface 1 GB GDDR3 memory interface Dual-Link DVI,HDMI,VGA ports TeraScale 2 Unified Processing Architecture DirectX, Shader Model 5.0, Open GL 3.21 ATI Stream acceleration technology. Form Factor: Low Profile ATI CrossFireX multi-GPU technology