First of all, I'd like to thank you all for being such a valuable resource, though this is my first time posting here, I've used this website countless times for help with other issues.
Alright, now the problem I'm having is with my fans on my Biostar P4M900-M4 motherboard. It has two fan headers, both with three pins. I've connected two coolermaster fans scavenged from an old computer to those headers. All fans are 3 pin fans. The problem I'm having is that they always run at full speed no matter what! The CPU temp according to the bios is about 20 celcius, but the CPU fan runs at approx 4,500RPM and the case fan runs at 2,000RPM constantly.
I've talked to biostar support, and I've been told that I should buy a 4 pin fans (to put on my 3 pin headers?) in order to regulate the speeds correctly. This makes no sense to me, as I cannot see why a PWM fan would be needed if the PWM control wire wouldn't even be connected.
If someone can shed some light on this problem, or case and CPU fan standards in general, it would be greatly appreciated.
Sorry, I forgot to mention that I tried speedfan already... I configured it properly (I think) and automatically controlling the speeds didn't work, and manually changing them didn't either. Thanks though.
Hmm... Some of those DIY controllers looked pretty interesting, since I dont have any empty 3.5" or 5.25" bays empty, I might go with one of the cheaper ones if I can't solve the problem, thanks for that link. On the other hand, I'd like to figure out what is causing this problem though.
The motherboard says it has a "fan speed controller" so wouldn't it make since that it should be able to regulate the speed of the fan by changing the voltage supplied to it? All my other systems with 3pin fans have been able to adjust speed accordingly.