Solved Overclocked video card Radeon 7950 drops to 501 MHz

Ultimate Windows 7 ultimate 32-bit
July 13, 2015 at 20:13:49
Specs: Windows 8.1, i7 4790, 24GB
I've recently began to experiment with overclocking my XFX Radeon 7950 from the default 800/1250MHz to 1040/1490MHz, through the use of MSI Afterburner.
Of course I had to increase voltage from the default 1.031V to 1.15V, however I'm having trouble maintaining the OC Clock speed.

I would start my game and get hours of OC performance game play, but at some point the temperature would jump from average of 69C to peak of 95C. Then out of nowhere the temp drops to around 55C and I noticed that the clock speed dips down to 501MHz(Voltage also drops to 0.806V).
This weird underclock would stay this way even if I restart my game, or switch to default clock and back. No matter what I do, the peak clock speed remains exactly 501MHz until I restart.

After a restart I could once again get my OC 1040MHz core clock back, until the cycle begins again (temp spike, core clock drop to 501MHz, voltage drop, until restart.)

I'm beginning to wonder, if I've somehow tripped some kind of built in fail safe on the GPU or something?

Any help will be greatly appreciated.

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July 14, 2015 at 05:18:02
✔ Best Answer
It would appear that you're over-overclocking it. 95C is dangerously high; the max is usually about 100C. My guess is you're triggering the thermal protection circuitry & the card is underclocking to protect itself from burning out. Try backing down on your settings a bit.

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