Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I'm running my CPU Q6600 overclocked at 3GHZ (1.25Vcore) on an Asus P5B Deluxe with a be quiet Dark Power Pro 550W PSU.

Recently I bought XFX 6970. And just now I noticed a strange problem.

The GPU runs perfectly. I can play any game I want at full details, 2xAA, 16xAF and everything else maxed out in 1920x1080. The highest temp. I ever had were 85°C with the fan running at 37%. The average temp. is 68-75%.

The fan is controlled via Catalyst CC, automatically. I also have Ati Try Tools installed. Strangely though no matter how demanding the game is, and how high the temp. goes, the fan never, ever goes faster than 37%.

With ATI Tray Tools installed or not installed. It plays no part in it.

Now comes the strange part: I tried to manually increase the fan from 37% to 50% just to see how far my temp. would drop if it were at 50% during an graphically demanding game.

Usually, though randomly and not always, 1 out of 2 things happens then:

a) The system crashes. I get a blue filed screen with small black bars. I have to do a cold reset.

b) FPS in games significantly drop. Meaning whereas formerly in a game it was 50fps, now it's 35-40fps. Nothing changed in the game. It's the exact same spot I had 50fps for a couple minutes, now all of a sudden it's 35-40fps (sure it's still playable, but that's beside the point here.).

On a side note: It's not temperature related because the crash/fps drop happens regardless whether I'm in idle @ 45°C or in load @ 65, 75, 85°C (or anything higher than the idle 45°C).

What the hell is the matter?

share|improve this question

The fan never goes higher than that until it reaches extreme temperatures. You can use a program like MSI Afterburner which has excellent compatibility, maybe you can see if this causes a problem for you. MSI Afterburner also has an inbuilt fan profile system so you can create a graph on when you want the fans to speed up.

share|improve this answer
Ugh...don't like the application. Too overbloated. – Grumpy ol' bear May 23 '11 at 12:38

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.