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Getting lower RPM than advertised? - Page 5

post #41 of 46
Quote:
Originally Posted by Concorde105;12157003 
Yep, sure is. Does the fan speed increase under load? PWM fans usually run at lower speeds with lower temperatures.

No, it doesn't, that's what worries me. And I disabled Q-Fan.
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post #42 of 46
Thread Starter 
Hmm, odd. If you don't mind it running at full speed all the time, you could probably force it to do so in the BIOS.
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post #43 of 46
I WANT it to run at full speed all the time. Speedfan reports it at 100% no matter what the speed. I don't know where the option is in my BIOS.
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post #44 of 46
Thread Starter 
The option in BIOS should be under "PC Health Status" or something similar. Just keep looking through the main pages of the BIOS until you find something that usually lists temperatures, and should give you an option to disable CPU fan control. That should make the fan run at full speed all the time.
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post #45 of 46
Only option I can find for that is Q-Fan. I've disabled that. However, the speed is STILL fluctuating - Normally sitting around 1800-1900 rpm (actually, usually about 1850). Now, I KNOW this fan can reach at least 2500 rpm, and I KNOW that I've seen it reach 1950 rpm on my hardware particularly. But the mobo still seems to be controlling the speed. For one, the speed is still fluctuating in increments of about 10 rpm at a time in speedfan, which isn't a great deal, but when there are fluctuations of about +/- 40 or 50 rpm, then it can't be tachometer error.

Now speedfan is reporting the temperatures at load and idle shown in the pictures below. Interestingly, that check box marked "automatic fan control" does nothing as far as I can tell. The Fan speeds are already at 100%, but will STAY at 100% no matter what the speed of the fan is. It seems to depend entirely on what happens when I boot up the system. Sometimes I see speeds of 1600 rpm, sometimes speeds of 1900 rpm, most commonly 1850 or thereabouts.
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post #46 of 46
Thread Starter 
Hmm. If those are load temps, they are actually very, very nice. No need to run the fan at 2,500 RPM if those are the temps you're getting. The fan should automatically speed up as the processor gets hotter, but it isn't now because you don't need it.

I'm not sure why the BIOS doesn't give you an option to disable CPU fan control though. That's just odd.

And the "Automatic Fan Control" option in Speedfan won't do anything if you can't control the speed manually already.
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My System
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CPUMotherboardGraphicsRAM
i5 3570k - 4.3 GHz ~1.16V ASRock Z77 Extreme4-M Gigabyte HD 7870 8GB G.Skill Sniper DDR3 1600 9-9-9-24 
Hard DriveHard DriveHard DriveCooling
Crucial M4 128GB WD Blue WD10EZEX 1TB WD Green WD5000AADS 500GB Hyper 212 EVO 
OSMonitorMonitorKeyboard
Windows 7 Crossover 27Q Dell SR2320L Logitech G510 
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