1 - GeForce GTX 645 (OEM) supports PCI Express 3.0. The Intel X79/SNB-E PCI Express 2.0 platform is only currently supported up to 5GT/s (PCIE 2.0) bus speeds even though some motherboard manufacturers have enabled higher 8GT/s speeds.
2 - 4096x2160 resolution supported through a single HDMI connector. 4096x2160 resolution is not supported with two DVI connectors.
3 - Support for HDMI including GPU accelerated Blu-ray 3D support (Blu-ray 3D playback requires the purchase of a compatible software player from CyberLink, ArcSoft, Corel, or Sonic), x.v.Color, HDMI Deep Color, and 7.1 digital surround sound will be added in a Release 260 driver. Upgrade your GPU to full 3D capability with NVIDIA 3DTV Play software, enabling 3D gaming, picture viewing and 3D web video streaming. See www.nvidia.com/3dtv for more details.
4 - PCs with the GeForce GTX 645 (OEM) may be qualified by the manufacturer to run at lower power supply than noted above. Please consult your PC manufacturer for details.