I have an AMD Athlon(tm) II X4 631 Quad-Core Processor which I wanted to overclock somewhere I read that it was easy to get an overclock to 4,0ghz so in changed the multiplier in the bios to 40x. I rebooted and everything and started aida64 to test if everything was running stable. The maximum frequency the Cpu runs at is just 2,6ghz which is the baseclock of this cpu. In taskmanager and aida64 it shows that it's max frequency is 4,0ghz so I don't know why it is not using it till 4,0 ghz. can anyone help or does anyone know why this is happening?