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Same as the powerful GeForce GTX 680, the GeForce GTX 640 is based on the revolutionary Kepler architecture for premium multimedia performance and reliable gaming. With innovative thermal design, the ECS GeForce GTX 680 graphics card delivers stable performance.
Kepler GPU Architecture NVIDIA's Kepler GPU architecture has been designed from the ground up not just for maximum performance, but optimal performance per watt. The new SMX streaming multiprocessor is twice as efficient as the prior generation and the new geometry engine draws triangles twice as fast. The result is world class performance and the highest image quality in an elegant and power efficient graphics card.
NVIDIA Adaptive Vertical Sync Nothing is more distracting than framerate stuttering and screen tearing. The first tends to occur when framerates are low, the second when framerates are high. Adaptive V-Sync is a smarter way to render frames. At high framerates, V-sync is enabled to eliminate tearing, at low frame rates, it's disabled to minimize stuttering. It gets rid of distractions so you can get on with gaming.
New Anti-aliasing Mode: FXAA Anti-aliasing smoothes out jagged edges but can be demanding on framerates. FXAA is a new antialiasing technology that produces beautiful smooth lines with minimal performance impact. And with Kepler based GPUs, you'll be able to enable FXAA in hundreds of game titles through the NVIDIA Control Panel.
NVIDIA 3D Vision Surround Ready Expand your games across three displays in full stereoscopic 3D for the ultimate “inside the game” experience with the power of NVIDIA 3D Vision and SLI technologies. NVIDIA Surround also supports triple screen gaming with non-stereo displays.
NVIDIA CUDA Technology CUDA technology unlocks the power of the GPU’s processing cores to accelerate the most demanding system tasks – such as video encoding – delivering up to 7x performance over traditional CPUs.
Microsoft DirectX 11 Support DirectX 11 GPU with Shader Model 5.0 support designed for ultra high performance in the new API’s key graphics feature, GPU-accelerated tessellation.

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“its really quiet, and uses only one slot. its low wattage and powerful enough for the occasional gamer.”— 3/29/2013
“Not the most fast (GDDR3 as opposed to GDDR5) nor the most withering of cards, but at $85 it works like a champ. ...”— Machraven 3/7/2013

