Overclocking

For overclocking I put the GTX 780 Ti through the same testing I use on every card. I run through GPU and then Memory overclocking individually and document the results I see then attempt to run them together. As you will see below, I started with stock clocks on the GPU and I saw 1020MHz from the GPU Boost 2.0, an impressive number in itself. From there I slowly bumped things up until 350Mhz offset where it finally failed. Knowing my limit I slowly worked my way back up to the highest clock I could run without crashing, 340Mhz offset for 1332Mhz clock speed. The end result gave me a whopping 26% increase in FPS in the test as well while overclocked.

In the image below you can see how as I bumped up our GPU clocks that I knew I was getting close to the limit when my clock speeds stopped being completely stable.

Memory testing was similar but quicker than with the GPU clock. I bumped things up from 0 up to 600Mhz where it failed then back to 550 for a pass result. Where things get a little interesting is when you look at my FPS results throughout my memory overclocking. As you can see beyond 200Mhz I really didn’t see any performance improvements and in some cases things slowed down. That was a little disappointing, even though we managed to push the GTX 780 Ti to very impressive 8100Mhz memory clock speed.

Putting my two overclocks together turned out to be the biggest challenge of all. At first everything I did would cause a hard crash and reboot before the benchmark would complete. It wasn’t until I turned the memory clock WAY down that I was finally able to get a pass result (there was one result before that passed but was 20 FPS lower that I would consider a fail). After that I bumped things up slowly with very little results. In the end I was able to pick from an impressive overclock on the GPU or the Memory, running them together proved to be too much. Even so, the performance improvements were impressive.