ZOTAC GeForce GTX 560 1GB GDDR5 PCI Express 2.0  Dual DVI/HDMI/Displayport SLI Ready Graphics Card, ZT-50701-10M NVIDIA GeForce GTX 560 GPU, 336 Unified Shaders, 1GB GDDR5, 256-bit memory bus. Core Clock: 820 MHz, Shader Clock: 1640 MHz, Memory Clock: 4008 MHz, PCI Express 2.0 (compatible with 1.1) NVIDIA ForceWare Drivers, Microsoft DirectX 11, OpenGL 4.1, Microsoft Windows XP/Vista/7 NVIDIA Unified Atchitecture, NVIDIA 3D Vision Surround ready, NVIDIA SLI ready, NVIDIA PhysX & CUDA Technology. NVIDIA PureVIdeo HD technology, HDMI xvYCC Color & DeepColor technologies, HDMI 1.4a compliant, Hardware-accelerated Blu-ray 3D ready ED 480p, HD 720p, HD 1080i, Full HD 1080p