Now that we know the differences between the different GTS 250 boards, we move on to the next most important question: What is the overclocking limit of the GTS 250?

Following is the overclocked speeds used, including stock PCI-E BIOS settings. Each clock setting was verified stable using the FurMark Extreme Burning test. 5 MHz higher on any of the 3 clocks began producing artifacts and finally driver failure. Our various tests were conducted using the EVGA Precision tool and use both the NVidia 196.21 and 197.34 drivers.

Even during the Extreme Burning test, GPU temps never passed 55°C. This is, of course, with 100% fan power. Notice that your results may vary, but you should easily be able to set your clocks higher than the Superclocked editions of this card.

Overclocking Limits

Clock Starting OC Limit Increase
Core 756 MHz 825 MHz 9.1 %
Memory 2200 MHz 2454 MHz 10.4 %
Shader 1836 MHz 2025 MHz 9.4 %