Haven't changed voltage at all is this ok?

[Snappcello]

I am currently running my GPU, a Zotac GeForce GTX 970 4gb, with a boosted 190MHz core clock and a boosted 180MHz memory clock. I have not touched the voltage setting yet out of fear of causing damage to my GPU, but now I am wondering if I can damage my GPU by upping the clocks without giving it sufficient voltage. So far things seem stable though. When running tests such as Heaven DX11 benchmark tests and playing GPU intensive games such as GTA V I am not noticing anything strange and it is not crashing my system.

I did up the core clock by 250MHz last night through a series of incremental increases to see when my system would crash. A boosted 250MHz core clock was the magic number for it. I tried to do the same with the memory clock but I never got any crashes even past a 500MHz boost. After reading through many forums and websites talking about overclocking I dialed the two settings back a bit to maintain absolute stability for my card.

I am noticing a 20 FPS increase with my GPU core clock running at about 1.49GHz in the Heaven benchmark tests at the settings and I couldn't be happier, but I just want to be sure I'm not damaging my card since I know little to nothing about overclocking.

Any suggestions are welcome.

 

[alceryes]

You're doing it right.
If it's stable without upping the voltage and you're happy with the results no need to adjust anything more. You're not going to hurt it by NOT upping the voltage as long as it's stable and isn't showing 'artifacts'.