evga precision x oc auto overclock locks up

It is merely a quick way to see if your card can even handle being out of spec easily. Below is the voltage curve in PX1, but it's exactly the same in Afterburner. Tweaking the fan speeds is also essential if you want to optimize clocks for consistency (NVIDIA's GPU Boost start to throttle after the GPU enters the 70C range by default, although you can adjust that a bit with the temperature curve).

Power and temperature targets are kind of whatever is necessary. I personally use 3DMark Port Royal, since it tests RTX as well, and 3DMark itself is configured to error out and tell you if there are any issues. Keep raising the dot until it gets unstable and then pull it back down. Test in Unigine or Furmark or 3DMark or whatever your preference is. If you want to undervolt, do it on a lower voltage. Open up the voltage curve, see and note down at what voltage the curve starts to flatten, and then in the main window, drop the core clock by -100 to -200 and then go back into the voltage curve and raise the dot at the voltage you noted before as high as you can, and apply.

Evga precision x oc auto overclock locks up