Fan always at 100%, I'm stumped.

[Tekkerson]

Just got a new setup I built AMD Phenom II X6

Stress tested and everything is great, Prime95 going for hours and the proc has never gone higher than 44C. (25C idle)

Whenever I turn the computer on the CPU fan is always running at 100% even when it's idle at 25C.

I just installed Windows 7 and BIOS has default settings, Cool 'n Quiet is on auto.

[Kondrath]

Whenever I turn the computer on the fan is always running at 100%.

Does it remain at 100%? Or just while you turn it on for a few seconds?

[Tekkerson]

ALWAYS. As said in the title :)

[treemonster]

i'm assuming your talking about the cpu fan?

you might check in the bios to see if there are variable settings for the cpu fan.

personally i was not aware if it was possible to manually change fan speed, and unsure of if the amd proprietery fan stuff lowered the rpms based on temps or not. so any info on this subject would be interesting to me. although i though cool and quiet was what managed cpu fan speed on amd systems.

[Tekkerson]

I also thought Cool 'n Quiet was supposed to monitor & regulate fan speed control... But it's not working?

[mak123]

first remove the fan and clean it around

apply new solution and fix it properly... :cool:

[Kondrath]

ALWAYS. As said in the title :)

Oh okay, that's what I figured, but the "when I turn the computer on" part made me re-think.

Hmm, I dunno' what I'm talking about, but is it possible you've got the CPU fan plugged into the wrong slot? Or through the PSU? I don't even know if that's possible or not, but just making sure :p

Try a BIOS update?

[Tekkerson]

I did just say that the setup is new I just got the parts from new egg yesterday. The heatsink has virtually no dust whatsoever. The motherboard has a port labeled CPU_FAN and that's where I have the CPU fan plugged in. I already upgraded my BIOS to the latest version and it still does the same thing.

[Kondrath]

I did just say that the setup is new I just got the parts from new egg yesterday. The heatsink has virtually no dust whatsoever. The motherboard has a port labeled CPU_FAN and that's where I have the CPU fan plugged in. I already upgraded my BIOS to the latest version and it still does the same thing.

Well, ya' got me... Defective MOBO or CPU fan?

[BigHoss]

reseat the fan plug into the board its shorting on somthing; maybe backwards

[Tekkerson]

I found out what it is, who would've thought they'd have dumb default motherboard settings?

The default motherboard setting is for no CPU Q-Fan Function. (I'm assuming Q stands for "Quiet" perhaps?) I didn't see this before but there's so many options in the BIOS I might have overlooked it.

I changed this setting to PWM Fan and it's very silent now. Thanks for the other suggestions though, might help the next time it's not my motherboard. :)