To put our Nvidia GTX 780 to the test I used a beta version of EVGA precision that supports the new card. To test my overclock I used test number 2 on 3DMark 11 set to performance settings. I started by doing what most would do when overclocking. I cranked the fan up and pushed out power target and new temp target options all the way over. From there I started at 100 MHz then 200 MHz GPU Clock offsets and both passed my test. Next I went to 300MHz and my test failed right away. After rebooting everything I knew our best clock speed was somewhere in between 200-300MHz offset so I slowly turned down the clock until I was able to get it to pass. The end result was a GPU Clock Offset of +220 MHz and a GPU clock speed of 1215MHz total.
Once I figured out our max overclock without touching the overclock I tried to play with the voltage but it actually lowered my max overclock. This told me that my overclock was most likely limited by power or temperature limitations; I would need those limitations in the software to go higher. It’s nice to know that the GTX 780 has lots of room for overclocking though.