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While the ASUS GTX 560Ti (model ENGTX560 Ti DCII/2DI/1GD5) has all of the features to be expected on a Nvidia GTX 560Ti based video card, including PhysX, GeForce CUDA, Nvidia 3D Vision, and 1GB GDDR5 memory, they did not stop with just reference design offerings. They have implemented their DirectCU II cooling system, which integrates copper heatpipes and places them in direct contact with the GPU, while using dual 80mm fans for adequate airflow. In addition, the GPU is factory overclocked to a modest 830MHz, which doesn't seem like much, but every little boost can help.
An enthusiast can spend hours getting the best overclock possible by adjusting different settings. However, I'm not an expert at overclocking and prefer to do minimal tweaking to see what the average person can do to get the most out of their hardware.
Using ASUS's Smart Doctor a user can adjust the voltage, clock speed, and memory speed in varying degrees. The GPU runs at 830MHz by default, while the memory runs at 1000MHz.
To obtain the highest stable overclock, the program would adjust the GPU Clock by 10MHz increments. At the same time, the voltage would be increased very slightly by 0.001V, and the memory would be increased at varying intervals. Both the voltage tweaks and memory speed are arbitrary amounts with no obvious basis. After each adjustment, Futuremark 3DMark Vantage was run to verify stability.
After many adjustments, the test system froze at 960MHz and 1.013V. Increasing the voltage by 0.005V did not allow a successful run of PCMark Vantage. The clock speed needed to be lowered by 1MHz until a successful run was finished. At 949MHz, 3DMark Vantage finally ran successfully, with a voltage adjustment of .012V. Read more »
ASUS ENGTX560 DCII OC/2DI/1GD5 - Geforce GTX 560 DCII OC - 1 G GDDR5 Video Card Price $189.99

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