EVGA GeForce GTX 650 1GB - Overclocking

The lack of of boost technology on the GTX 650 meant that in theory the card should have a fair amount of headroom for manual overclocking, since it's built on the same architecture as the higher end cards that do support it. This, combined with the very low TDP of the GTX 650, along with its dedicated PCI-E connector and more than adequate phase power, left us hopeful that there was still a lot of juice to be squeezed from this particular fruit.

Before the card became unstable, we were able to add 220MHz to the base clock and 75MHz (300MHz effective) to the memory clock, for a stable overclock of 1,278MHz for the core clock speed and 1.325GHz (5.3GHz effective) for the memory. In order to achieve this, we raised the stock voltage of 1113mV to 1138mV. This equates to a whopping 20% increase in the core clock speed, as well as a 6% boost for the memory, which are certainly impressive figures for such a low power GPU. To test the impact of our efforts, we re-ran the Unigine Heaven benchmark as well as our 1,920 x 1,080 for Battlefield 3 test.



Read our performance analysis on the next page.