GPU Overclock is not applied correctly?

[TheNaitsyrk]

Today I overclocked my 780 TI in SLI.

 

Power limit 106% and then I started overclocking.

 

I overclocked from 0 to +139. I was getting 1203 with boost 2.0 core clock.

 

Then.... Heaven 4.0 benchmark. Stable works well.

 

I overclocked from +139 to +179. +40 difference

 

Then.... Heaven 4.0 benchmarks. Stable and also works well.

 

However, the core clock on both GPUs was 1215 at max and it once jumped to 1228 with +40 to core clock. I thought it would jump to 1250 but it didn't.

I could keep overclocking further but I guess it wouldn't have impact on the core clock.

 

Is this the best I can do without raising the voltage? (I'm still happy with 1215 since it's pretty pretty decent but I just wanna know).

 

[Dzzope]

Check the monitoring.. It will tell you if your running into power, voltage or other limits.

[TheNaitsyrk]

I mean, if I ran into voltage limits then I wouldn't be able to overclock further and I was able to push +40 but nothing changed which is weird. I was getting 1203 core clock without raising the power limit at all. So in theory 6% power limit increase gave me 12 core clock even though I overclocked way past 1203? It's really strange.