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Fan stopping completely at low temps?

post #1 of 20
Thread Starter 
So I was just sitting there chatting in Steam, when (to my horror) I noticed my CPU fan stop spinning completely. The fan in question is the one that comes with the Arctic Cooling Freezer 64 pro (or whatever it is), and supposedly has a long life expectancy.

Now, the creepy thing, is that this fan is completely stopping. It'll start up every few seconds (presumably whenever the load heats the cpu up enough for the fan to think that it is required).

I did what naturally came to mind, and attempted to run Prime95. The second I turn P95 on, the CPU fan starts spinning full throttle.
After P95 stops, and the temp cools to ~20c, the cpu fan will attempt to spin up every 4 seconds on the dot, but will fail and continue to fail until I start something that requires the CPU again.

Is this normal?

Set fan control to PWM in bios and it seems to be running at MUCh higher rpm now, but I will update on status later.
Also, lol @ 30+ views from AMD hardware enthusiasts and not one being able to tell me if having the cpu fan stop is normal at low temps.
Edited by Spongeguard - 12/30/10 at 2:20pm
post #2 of 20
I've seen coolers do that before, its fine. good temps btw.
    
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post #3 of 20
Do you have a 4 wire fan hook-up? How is it set up in bios? Temp controlled?
    
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post #4 of 20
Thread Starter 
Quote:
Originally Posted by We Gone View Post
Do you have a 4 wire fan hook-up? How is it set up in bios? Temp controlled?
If by 4 wire fan hook-up you mean 4-pin then yes, I am using a 4-pin fan controller. SMART fan control was set to auto in bios - I set it to PWM, and so far the fan is running a good 600 rpm higher at all times, and hasn't shut off yet.
post #5 of 20
Ok, I just set my CPU fan to run 100% in bios. keeps it nice and cool all the time
    
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post #6 of 20
Some fans cannot drop their RPM very low. When asked to drop the RPM to a low level it cannot sustain, the fan will simply drop to 0 RPM. Personally, I would drop that Smart Fan function (always sucked IMO) and opt for Speed fan which is much better.

Has this ever happened before?
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post #7 of 20
Thread Starter 
Quote:
Originally Posted by doritos93 View Post
Some fans cannot drop their RPM very low. When asked to drop the RPM to a low level it cannot sustain, the fan will simply drop to 0 RPM. Personally, I would drop that Smart Fan function (always sucked IMO) and opt for Speed fan which is much better.

Has this ever happened before?
This has never happened once before, on christmas day. It happened because I turned the heaters off in my room and the ambient temp dropped to about 15c, and so when I came back in the morning I saw that my fan had been reported as running at 167k RPM (which happens when the fan turns off and on again). It hasn't happened since then, but it is incredibly cold again today, so that's why.
post #8 of 20
turn off anything that has to do with fans in Bios and just use speedfan to change settings. Or keep it on 100% 24/7
post #9 of 20
You can hear your CPU fan turn off? Nice GPU cooler...
At least my CPU fan is too slow at idle to be heard when the GPU cooler is running. Maybe yours is running full tilt at most times?

Anyway, as said, SpeedFan is a nice program. I love it and with the newer versions it bumps up in increments of 10% when the CPU gets hot to give a more smooth change (instead of sudden 100%). Noticed it the instant I got it, so I guess it makes a difference
Edited by B!0HaZard - 12/30/10 at 3:52pm
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post #10 of 20
Quote:
Originally Posted by Spongeguard View Post
This has never happened once before, on christmas day. It happened because I turned the heaters off in my room and the ambient temp dropped to about 15c, and so when I came back in the morning I saw that my fan had been reported as running at 167k RPM (which happens when the fan turns off and on again). It hasn't happened since then, but it is incredibly cold again today, so that's why.
Yeah so I suspect what I mentioned before; the fan on the cooler is unable to run at low RPMs. Probably something like anything under 500RPM is translated to 0 RPM by your fan. Try experimenting with Speedfan since it allows you to change the RPM in small increments.
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