NVIDIA® SLI Technology Dramatically scales performance by allowing two graphics cards to be run in parallel. Only available on select PCI-Express models. NVIDIA® GigaThread Technology GigaThread is a new technology that enables thousands of independent threads to execute in parallel inside of the graphics core. This delivers extreme processing efficiency in advanced, next-generation shader programs. Full Microsoft DirectX 10 Shader Model 4.0 Support Also known as the Unified Shader Model, the Vertex shaders, Geometry shaders, and Pixel shaders are combined in to one unified shader. Also backwards compatible with DirectX® 9. True 128-Bit Floating Point High Dynamic-Range (HDR) Allows you to experience cinematic, life like environments, for an amazing graphics experience. PCI Express 2.0 / 1.1 Support Allows 500MB a lane or up to 8 GB/s at 16x speeds - allows for full support for new PCI-E 2.0 graphics cards. NVIDIA CUDA Support Accelerates CUDA based applications through the GPU's proccessing power allowing for faster application performance such as video transcoding. NVIDIA PhysX Ready Enjoy more visual immersion with life like physics for a more dynamic experience. NVIDIA PureVideo HD Technology Smooth video, accurate colors, precise image scaling, video decode acceleration and post processing, all provided by the graphics card to give you the best HD experience possible. This feature also offloads from the CPU to help reduce power consumption. OpenGL 3.0 Support Supports the latest version of OpenGL Unified Shader Architecture Provides an effecient single platform consisting of vertex shaders, geometry shaders, and the pixel shaders. This allows for better performance and visual quality. NVIDIA Lumenex Engine A portion of the GPU is dedicated to delivering 16x full-screen antialisasing, 128-Bit Floating Point HDR, and support for 2560x1600 resolutions all at incredible image quality and performance.

Performance	NVIDIA 8400 GS 459 MHz GPU 16 Processing Cores 400 MHz RAMDAC
Memory	512 MB, 128 bit DDR2 532 MHz (effective) 4.26 GB/s Memory Bandwidth
Interface	PCI-E 16x DVI-I, VGA, HDTV-7
Resolution & Refresh	120Hz Max Refresh Rate 2048x1536 Max Analog 1920x1200 Max Digital
Requirements	Minimum of a 350 Watt power supply. (Minimum recommended power supply with +12 Volt current rating of 18 Amp Amps.)