Tom's Hardware > Forum > Overclocking > Cooler and Heatsinks > Fan Runs at 100% always--noisy--help?

Fan Runs at 100% always--noisy--help?

Forum Overclocking : Cooler and Heatsinks - Fan Runs at 100% always--noisy--help?

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philosofool   01-21-2008 at 06:39:04 AM

I'm running an Athlon x2 64 3800+ with stock cooling and the fan on the cooler won't quit running at full boar. It's kinda loud, especially when the only thing I'm running is a text editor. I've been keeping cool: under 37C at load. I recently downloaded SpeedFan and found that even when I reduce my fan speed by 1000 RPM to around 1900RPM (which really reduces noise) I'm staying pretty cool (42C load). I don't mind a fan that whirls when things are hot, but I want one that doesn't when it's not, you know?

Anyone know why the devil this fan wants to run fast even when the CPU is staying at very cool temps? SpeedFan is fine for manually controlling things see what the results of different fan speeds are, but the rest of the time I'd really just prefer that my computer take care of that while I worry about more important things.

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closed_deal   01-21-2008 at 01:14:04 PM
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Is the 'Cool and Quiet' option on in the bios?

------------------------------ E8400 CO @ 4.2ghz stable | 2x 2 GB G.Skill DDR2-1000 5-4-4-12 @ 933 | X2 74GB Raptor X RAID 0 | X-Fi Music | X2 3870's @ 850/2502 | P5E X38 | Hiper 880W | Lian Li A70B Modded | 3DMark06 @ 4.45Ghz 19698 | Vista 64bit | 24" Sam'y 245B | Wintercooled
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bob8701   01-21-2008 at 03:04:09 PM
- 0 +

it depends on your motherboard, someboard has an option in bios name Qfan or such, enable it so motherboard will adjust the fan speed base ton the thermal reading of cpu

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philosofool   01-22-2008 at 06:04:16 AM
- 0 +

I found a smart fan control in the BIOS and enabled it. It slowed the fan down, but then the fan wouldn't speed up as the proc passed 40C. 1,200 RPM seems a little low on a 3,500 Max RPM fan for 40C.

There were two smart fan settings that I didn't touch in the BIOS:
-PWM Duty Off (set to 60 degrees C)
-PWM Duty start (set to 80C)
But from my seaches, I glean that these only apply to four pin fans...

Anyway, speed fan is keeping me at 40 degrees at 2800 RMP with prime95 going. My guess is that I'm going to have to suck it up until I can afford a better mobo. (BTW: BIOStar provides pretty awful documentation for their low priced nForce 520 ATX. It's get you through pluging in the wires, but there's zero information about the BIOS options.)

Other suggestions are welcome.

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