PU Fan Speed

[cyberdad]

I have a MSI KT3 Ultra2 Main Board with a XP2100+ CPU. I have a Thermalright SLK97 Heat sink with a 90mm Panaflo
fan. The fan is a three wire. My problem is the MSI Alert utility shows that the fan runs mostly at 3125 RPM and spikes at 6250. I think that there is no fan control on this MB, and the fan should be running at 6250. My idle temp is 32 C. I am positive that it is a 12v fan. MBM confirms the same figures. Should this fan be this way? I have checked the connections, and they seem to be OK.

 

[Zepper]

Have you watched the fan run to confirm whether it actually does speed up and slow down? Could be a defective sensor in the fan. Try plugging another known single speed fan onto the CPU fan header and see if it does the same (plug the CPU fan onto another header or to a drive power connector - don't want your CPU to fry). Or maybe you could rig up a way to measure the voltage at the CPU fan header to see if it varies.
. I had to get a BIOS update for my MSI to read fan speeds properly, but it wasn't reading at all not bouncing the readings.
..bh.