1. set fsb in Bios above 400MHz 2. Boot in Windows 3. start Everest Cache & Memory Benchmark 4. Make a screenshot of the result. 5. run P965StrapTweaker.exe 6. start Everest Cache & Memory Benchmark again 7. Make a screenshot of the Result. If you start the Application without Parameter the default Values for the five Bytes will be as follows : R1, FED14030h => 06 R2, FED14034h => 10 R3, FED1403Eh => 03 R4, FED1403Fh => 24 R5, FED14040h => 09 On my Asus Commando works very well , also on FSB above 600MHz. To set custom values for the R1-R5 Adresses use this Command Syntax: P965StrapTweaker.exe R1 R2 R3 R4 R5 Example: P965StrapTweaker.exe 06 10 03 23 09 If you want to run it each time Windows starts , you can put this custom Parameter start also in a Batch file and copy it in the Autostart Folder. Use at your own risk!