Overclocking. Second GPU sits at 50% usage.

[TheNaitsyrk]

Hey,

Today I decided to see what my GPU's in SLI are capable of. I overclocked as much as possible until crash, then I raised Power Limit in EVGA Precision X to 103%.

Then I overclockd by 10 core clock. Worked fine.

Then I overclocked by another 10. (Total 1100 overclock).

I run Heaven 4.0 and I see sudden FPS drop. I then checked GPU usage and 2nd GPU usage was 50%.

I thought it's a power limit issue so I raised power limit to 106% (maxed it out).

I ran the benchmark again, and the 2nd GPU was still sitting at 50% usage.

I then clicked default to make everything normal again whilst running the benchmark and the 2nd GPU was still at 50% usage at stock clock.

Any idea what happened and how to fix it?

 

[TheNaitsyrk]

Now I used different software to overclock (MSI Afterburner instead of Precision X). Managed to get +180 and it worked fine, however the core clock on both cards stayed 1215 and I thought that each +10 increase would show that I got that increase? I'm a little bit confused. The Heaven 4.0 score was about 35 points lower everytime I upped core clock by 10 which is strange.