Hey guys, I'm new to overclocking and this night I've been tinkering with my GPU. The GPU is the 4GB GTX 760 with an EVGA ACX cooler. I'm using their PrecisionX 16 tool to overclock my card due to the UI which I find easier to understand. I've started at a 50MHz overclock which people seem to recommend online and everything was great. I used the MSI Kombuster stress tester and it worked fine for 20 minutes and I was satisfied. Then I went on to Heaven 4.0 great blah blah blah yay 50MHz. Then I went to 60MHz everything is great 10/10 ign gr8 b8 m8 i rate 8/8 right? But then the 70MHz came and things started happening. I let MSI Kombuster for 25 minutes and was at 80-81c. Worked great even at high temperature no crashes. Then came the Heaven benchmark and it only was at around 64c or 67c (can't remember ) and it just crashed. I (quickly with panic) restart my system. Starts of weird whatever doesn't matter (at least I think) everything goes back to normal decide to try 60MHz again everything works. Then I tried 70MHz another time it was fine with the Kombuster and Heaven. So I decided sweet! Stability, awesome! Time to play some GTA V see what FPS's I can get in what places (if you want a cool FPS boost go to the tunnel thats in the woods that usually has no cars driving in it) works great played for an hour yay! So I decide it's time to benchmark the game aaaand halfway through the benchmark it crashes my whole system like any other overclock crash I had. But the GPU temp was at 65c (also my GPU became a lot cooler after letting precisionX 16 handle my fan curve, it's insane) so two questions.
1) Most importantly, did me overclocking to 70MHz with no extra voltage and no overheating damage my GPU or anything else. (crashes are scary)
2) Why the hell is my GPU crashing at 70MHz with no overheating at all. Is it possible my voltage is too low or is it possible my power target is too low. I'm running a 110% power target on PrecisionX.
3) Let's say hypothetically I just can't get 70MHz for anything, it's whatever, done. How can I really make sure that my 60MHz overclock is stable (I want to hand down this GPU to a family member later once I upgrade to the new line of Nvidia GPUs coming this year (can't wait).
Thanks if you've read all of this Newbieness.
Also wanna add that I did not add any extra voltage to my GPU. Well at least that's what the voltage bar says in PrecisionX