Quote Originally Posted by minsc_tdp View Post
New issue:

The CPU fan header suddenly started overriding my Silverstone FM121 fan controller. It was comfortable at 1600 RPM but now the onboard connector pumps it back and forth betwen 1600 and 2000. Turning the Silverstone all the way down has no effect, which is a shock given that it's right on the power line and the mobo header is just a single yellow line.

Temps are good (35 C idle @ 2 GHz C1E) and <56C under full load (3 GHz, TAT)

I think I might have connected that CPU header wrong - in the manual it shows 3 pin connectors on pins 1-2-3 and a 4 pin connector on 1-2-3-4 where the 4th pin is yellow and on PIN 4. Should my single yellow pin connector be put on Pin 4? Right now it's on Pin 3.

Even better, can I unplug it entirely or will the board complain? I thought I saw somewhere that you MUST have a CPU fan on the right header or "bad things happen" but I don't remember where I saw that, and can't see how as long as I monitor temps. I don't need the RPM monitoring (my ears work fine.)

Update: Now, lowering the SilverStone controller has no effect, even if I set the Proc Fan to Manual in IDCC and set it all the way min or max. Something somewhere thinks it's smarter than both of these manual fan controls and is maxing out the volts to the fan. WTH?
If all you're connecting is the 1 yellow wire to pin 3 (3rd from the right) on the MB, then the MB is not the problem. That's just the tachometer signal to the sensor chip. There's no way for the MB to control that fan unless you're actually getting power from that or one of the other fan headers.