627 million 40nm transistors TeraScale 2 Unified Processing Architecture 400 Stream Processing Units 20 Texture Units 32 Z/Stencil ROP Units 8 Color ROP Units DDR3/GDDR5 memory interface PCI Express 2.1 x16 bus interface DirectX® 11 support Shader Model 5.0 DirectCompute 11 Programmable hardware tessellation unit Accelerated multi-threading HDR texture compression Order-independent transparency OpenGL 3.2, 3.3, and 4.0 support15 Image quality enhancement technology Up to 24x multi-sample and super-sample anti-aliasing modes Adaptive anti-aliasing 16x angle independent anisotropic texture filtering 128-bit floating point HDR rendering ATI Eyefinity multi-display technology1,17 Three independent display controllers Drive three displays simultaneously with independent resolutions, refresh rates, color controls,