It seems to be a problem that my old Gigabyte EX58-UD4P mainboard doesn’t support a base frequency over 150 MHz with this CPU, resulting a maximum core clock of 3.3 GHz for all cores (Old post). I tried all available bios firmwares, but none was able to POST with a higher base frequency. It was possible to overclock while running Windows 7 using the Gigabyte EasyTune 6 tool. But this solution isn’t satisfying for a daily use.
Since 2009 I have an Intel Socket 1366 system running. So over the years I overclocked the built in Core i7-920 to (nearly) 3.5 GHz.