ZOTAC GeForce GTX 580 AMP! 1536MB GDDR5 PCI Express 2.0  Dual DVI/mini HDMI SLI Ready Graphics Card, ZT-50102-10P NVIDIA GeForce GTX 580 GPU, 512 Unified Shaders, 1536MB GDDR5, 384-bit memory bus, Core Clock: 815 MHz, Shader Clock: 1630 MHz, Memory Clock: 4100 MHz, PCI Express 2.0 (compatible with 1.1) DirectX 11 support, OpenGL 4.1, NVIDIA ForceWare Drivers, Windows XP/Vista/7 NVIDIA Unified Architecture, NVIDIA 3D Vision Surround ready, NVIDIA PhysX Technology & CUDA Technology Dual dual-link DVI (Up to 2560x1600), Mini-HDMI 1.4a w/audio, HDCP ready, SLI bridge connector [3-way SLI ready] ED 480p, HD 720p, HD 1080i, Full HD 1080p