Re: 4-pin pwm fan.

One of the machines is a newish dell btx, that's having major cooling

> problems (random page faults, hd temp goes up to about 130 F, etc). I > narrowed the problem down to the main case fan, which is a four pin > PWM (pulse-width modulation). Apparently, the bios (happens without > hd/os) forces the fan to spin at a ridiculously low speed, > approximately 10% of capacity.

If it's newish, call Dell and have them send you a new motherboard, or a new fan, or both, under warrantee.

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