Re: Kinda noob Overclocking questions
If it's NF2 (especially something like the Ultra400 variants) then that BIOS is probably pretty proprietary. Chipset-level control started appearing in stuff like nForce4 and later. Putting a resistor inline is a better idea on those fans. Or using the mobo for trap shooting.
Re: Kinda noob Overclocking questions
3-pin fan connections can't control the fan speed. That's what the forth pin in 4-pin fan connections are for. You could wire in a potentiometer for manual control of the fan or buy a chip that can control it thermally.
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Re: Kinda noob Overclocking questions
Yeah, 3rd wire is just a tachometer, it sends a voltage pulse each half revolution.
The pot resistor would work, but PWM control is more elegant and efficient. Those little TI MPS430 parts should work well enough for a fanbus.
No BIOS updates available which correct the problem? No software or OS options?
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