Note: The below specifications represent this GPU as incorporated into NVIDIA's reference graphics card design. Graphics card specifications may vary by Add-in-card manufacturer. Please refer to the Add-in-card manufacturers' website for actual shipping specifications.
GPU Engine Specs:
576CUDA Cores
823Base Clock (MHz)
39.5Texture Fill Rate (billion/sec)
Memory Specs:
4.0 GbpsMemory Clock
1024 MBStandard Memory Config
GDDR5Memory Interface
128-bitMemory Interface Width
64.0Memory Bandwidth (GB/sec)
Feature Support:
PCI Express 3.0 Bus Support 1
YesCertified for Windows 7
3D Vision, 3D Vision Surround, CUDA, DirectX 11, PhysX, TXAA, Adaptive VSync, GPU Boost, FXAASupported Technologies
Display Support:
4 displaysMulti Monitor
2560x1600Maximum Digital Resolution 2
2048x1536Maximum VGA Resolution
YesHDMI 1.4 3
One Dual Link DVI-I, One Dual Link DVI-D, One HDMI, One DisplayPortStandard Display Connectors
YesAudio Input for HDMI
Yes7.1 Channel HD audio on HDMI
YesTrue HD and DTS-HD Audio Bitstreaming
YesPCI Express 3.0 support
DP 1.2Display Port Support
Standard Graphics Card Dimensions:
4.376 inchesHeight
5.7 inchesLength
Single SlotWidth
Thermal and Power Specs:
97 CMaximum GPU Temperature (in C)
130 WMaximum Graphics Card Power (W)
450 WMinimum System Power Requirement (W) 4
3D Vision Ready:
Yes 3D Blu-Ray
Yes3D Gaming
Yes3D Vision Live (Photos and Videos)

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.