Hi I have a new am2 motherboard running 4600+ dual core, and the fans are running really slowly (only bout 950rpm - full speed should be bout 3000). it has headers for cpu, system and power fans, but only the cpu and system (for rear fan) headers run slowly. plugging same fan into front power header it runs fine at full speed, plugging any fans direct from psu adapter runs full speed fine. I know my psu is fine, and the fans too. there is no setting or info in bios pertaining to fan speed or any monitoring whatsoever, and cpu intensive use doesn't alter speed. I tried 'speed fan', it can see the speeds but can't alter them. What does anyone think? is the motherboard faulty?

does speed fan say that the cpu temp is high?

Yeah the temperatures were climbing and fans weren't picking up, so I decided not to risk seeing what would happen further and ran the cpu fan straight off the psu.