Some boards will allow you to bypass the controller and run the fan at full speed through jumpers. Check that out. Not really sure if commercial computer motherboards actually give you that option through jumpers though. If so, just insert the jumper and you are done. But, it might not be possible.
In my company, I was just working on programming the fan controller in one of our boards to be sensitive to temperature. To do that, you need access the controller and reprogram it. It's really easy to reprogram it. But, writing the code to "access" it takes a little bit more work.
Not really sure which chip the AMD based motherboards use. Doesn't have to be the "same" on all AMD motherboards also. The Intel based motherboards "typically" use the LM63 chip for that purpose, I think. If you want to reprogram it, you can tell it to run at full-speed always instead of being temperature sensitive.