In order to determine if your fan speed control programming is adequate, I need to see the contents of the the IA32 Temperature Target Model-Specific Register (MSR). Its address is 1A2h. There are lots of third-party freeware Windows tools that can dump MSR contents. One of the better ones is called RWEverything (Read-Write Everything).
A picture of the fan speed control setting page in your BIOS would be helpful too.