Overclocking my GPU is causing a lower result

[beany_bot]

Im a a bit stuck OC my GPU guys.
Its a 390x (Asus Strix)

And when I add 50mv, the score goes down? it's only 77 degrees so I cant imagine thermal throttling?

Here was my working. You will see that 1180Mhz is worse than previous. This is using afterburner and heaven

 

[beany_bot]

Have you increased the power limit? If it's hitting the power limit it will throttle the same as if you're thermal throttling.

I haven't, i couldn't find anything about that that made me comfortable playing with it. can you advise?

 

[beany_bot]

Im finding myself adding loads more power, volts all for 1fps. I think I should quit at 1160 with no increased power or volts.

 

[beany_bot]

Ok thanks. That's sounds simple and sensible. Only thing is... I'm kinda on my limit of my PSU so didn't really want to go power mad. What you think? (my build is in my sig).

Also I'm reading that typical OCs for this card are around 1200. So not sure it's worth stressing my PSU for the sake of 40mhz. Like 2fps max.

 

[beany_bot]

I think you should be ok on that Psu with one card to push without worrying. Amd Matt was running 2 x 290x's on a 750w overclocked. You should be fine on one card just using the power settings and adding some voltage. For everyday usage i like to run no voltage and max power overclocks. You get most of the performance this way and not much extra heat from the voltage added.

That's interesting. I wonder why it's different to cpus. Where is all about the mv to make it stable. Thanks for advise. What temp would you say are safe in heaven. 80? 85?

 

[beany_bot]

OK. After hours of testing. This is her maxed out at 84 degrees. It's absolutely all I can get out of her. No higher clock speeds are stable, even at increased voltages. Gained 5fps. Not astounding lol. But learned how to clock a GPU.

 

[beany_bot]

God damn.... just loaded GTAV and im getting Artifacting!! Now I have to start all over again using GTAV as my stress test....sigh!.

 

[beany_bot]

PC completely crashed playing GTAV. Possibly the PSU. I've removed the overclock for now. Just not worth it.

 

[beany_bot]

I appreciate the help but im going to leave it. Waiting for 4K and Vega or something that can run it. the 390x is doing me well at 1080p for now. No point chasing a few extra FPS. Also my PSU shouldn't really be doing this. Not with my CPU clock also.

 

[beany_bot]

Put the memory back to stock and focus on the core, Rome wasn't built in a day.

For finding a 24/7 stable overclock, the best way to do it is to pick a starting core clock, say 75Mhz over stock and test by gaming for 20 minutes. If it does not crash, put the core up another 25Mhz until it does. If it does crash, add voltage. If it crashes quickly, put voltage up three notches. If it crashes after 10 minutes, put it up two notches. Rinse and repeat till you find the maximum.

You'll need to be patient.

Thats exactly what I was doing all day....but in heaven. Had it totally nailed. But it appears GTAV is much harder on GPU's than heaven with everything maxed out....go figure. Honestly it's fine as it is.