290 GPU throttling after cooler installed

[Dorosh]

Hi,
I've recently installed the Accelero hybrid on my R9 290, and while testing I can't seem to figure out why the GPU is throttling when my core temp is less than 60 degrees now... VRMS are also bellow 70 degrees. It seems like the higher i turn up the clock rates, the more it throttles down.
Before adding the cooler, I could run Kombuster and as soon as the GPU usage was at 100 % the core clock would max out at 947 MHz - Now (everything reset to default) when i run kombuster, the core hover's around 930 MHz. If i run the "stress test (GF OC Test)" the clocks max out.
One big problem is that I score a lower score in 3DMark11...
Please help!

 

[ShadyHamster]

Kombuster isn't the best program to use to test out the gpu clocks due to the extra stress it puts on the card.

I would use something like unigine heaven or valley to test.

 

[Dorosh]

Kombuster isn't the best program to use to test out the gpu clocks due to the extra stress it puts on the card.

I would use something like unigine heaven or valley to test.

Thx for the reply. I tried using Unigine heaven and with the default settings the cpu clock stayed at 947, but when I over clock to 1150 the clock stays around 1030-1070. I was able to get up to 1150 before adding the cooler as long as i kept my fan at 100% and the core temp stayed around 92 degrees...

 

[Dorosh]

UPDATE:
So I may have solved my own problem. The other day I was playing around with the "3D application setting" in the CCC. I must have missed putting a setting back as I reset to default and now I'm getting the same results as I was before with 3dMark11 @1150 MHz cpu.
The interesting thing is that when I go to 1200 the MHz get throttled back down to less than 1100 again. It seems to me that there is something with the drivers and/or hardware that detects instability and clocks itself down, similar to when there is too high of temps.