For overclocking our NVIDIA cards we will be using EVGA's Precision too (ver. 4.1) as this gives us all of the options we require. Should you desire, ASUS' own GPU Tweak is equally good.



Above is a screenshot of GPU-Z showing the reference (factory overclocked) speeds and reference boost clocks. As previously stated, the core clock is among one of the fastest factory overclocks available on the GTX780. We have also included the ASIC rating of our sample. The ASIC rating basically tells us how good the overclock will be. The higher the ASIC rating, the better the overclock is likely to be, particularly on air cooling at a given voltage. Average ASIC readings for our GTX 780s range from 70% to 80%. As you can see from the screenshot above, today’s sample is average and clearly not a 'cherry picked media sample'.

In truth, we are still dubious as to the real value of this reading but time will tell. As we have been asked on numerous occasions to include it in our reviews we felt it only right to show it although please take any of these values with a pinch of salt until we can confirm whether it does actually mean a higher or lower overclock will be achieved.



Sadly our overclocking efforts soon became a frustration. At an already hefty 1020MHz, we were not hoping for much as some GTX780's are not capable of this speed, let alone past it but we did manage to hit 1.1GHz (none boost) although it certainly was not stable at this speed. To hit some form of stability we had to reduce this figure to 1060MHz. This did however give us a boost speed of 1200MHz so we were very happy with this. Couple that speed with a very good overclock on the memory and we are confident that this card is not only one of the fastest pre-overclocked GTX 780s available but also hits similar heights of other GTX780s we have tested.



After settling on our stable clockspeed which was verified by multiple runs of Unigine Heaven and 3DMark we benchmarked the overclock and compared it to stock results with Unigine Heaven 4.0 to evaluate the benefits of overclocking the GPU.