GeForce 8400GS, 512MB GDDR2, 450MHz, PCI-E, DirectX 10

Windows Vista®
Enjoy powerful graphics performance, improved stability, and an immersive HD gaming experience for Windows Vista. ATI Catalyst™ software is designed for quick setup of graphics, video, and multiple displays, and automatically configures optimal system settings for lifelike DirectX 10 gaming and the visually stunning Windows Aero™ user interface.

TurboCache Technology
By allowing the graphics processing unit (GPU) to share the capacity and bandwidth of dedicated video memory and dynamically available system memory, TurboCache turbocharges performance and provides larger total graphics memory.

Microsoft® DirectX® 10
World's first DirectX 10 GPU with full Shader Model 4.0 support delivers unparalleled levels of graphics realims and film-quality effects.

Shader Model 4.0
Shader Model 4.0 adds support for indexed temporaries which can be quite useful for certain tasks.Regular direct temporary access is preferable is most cases. One reason is that indexed temporaries are hard to optimize. The shader optimizer may not be able to identify optimizations across indexed accesses that could otherwise have been detected. Furthermore, indexed temporaries tend to increase register pressure a lot. An ordinary shader that contains for instance a few dozen variables will seldom consume a few dozen temporaries in the end but is likely to be optimized down to a handful depending on what the shader does. This is because the shader optimizer can easily track all variables and reuse registers. This is typically not possible for indexed temporaries, thus the register pressure of the shader may increase dramatically. This could be detrimental to performance as it reduces the hardware’s ability to hide latencies.

PCI-E 2.0
PCI Express® 2.0 –Now you are ready for the most demanding graphics applications thanks to PCI Express® 2.0 support, which allows up to twice the throughput of current PCI Express® cards. Doubles the bus standard's bandwidth from 2.5 Gbit/s (PCIe 1.1) to 5 Gbit/sec.

GigaThread™ Technology
Massively multi-threaded architecture supports thousands of independent simultaneous threads, providing extreme processing efficiency in advanced, next generation shader programs.

Quantum Effects™ Technology
Advanced shader processors architected for physics computation enable a new level of physics effects to be simulated and rendered on the GPU--all while freeing the CPU to run the game engine and AI.

PureVideo™ HD
Available on HD DVDs and Blu-ray discs, high-definition movies are bringing an exciting new video experience to PC users. NVIDIA® PureVideo™ HD technology lets you enjoy cinematic-quality HD DVD and Blu-ray movies with low CPU utilization and power consumption, allowing higher quality movie playback and picture clarity. PureVideo HD technology provides a combination of powerful hardware acceleration, content security, and integration with movie players, plus all the features found in PureVideo.

CUDA Technology
NVIDIA® CUDA™ technology unlocks the power of the hundreds of cores in your NVIDIA® GeForce® graphics processor (GPU) to accelerate some of the most performance hungry computing applications. The CUDA™ technology already adopted by thousands of programers to speed up those performance hungry computing applications.

PhyX Technology
NVIDIA® PhysX™ is the next big thing in gaming! The best way to get real-time physics, such as explosions that cause dust and debris, characters with life-like motion or cloth that drapes and tears naturally is with an NVIDIA® PhysX™-ready GeForce® processor.

GIGABYTE GV-N84S-512I, GeForce 8400 GS, GDDR2, 64 bit, 800 MHz, 2560 x 1600 pixels, PCI Express 2.0