Okey well i got that PSU with my computer i bought 4 years AGO.. I've heard that u can just click on a button on that MOBO I've ordered to Overclock it to around 4,5 ghz but I'm not sure if it works..
There are some other settings you're going to have to tweak to make sure it will be stable. Check out this guide. It's kind of general and more geared toward EVGA motherboards, but you should be able to find the same settings in your bios:
Also, just remember to increase the voltage and multiplier little by little while you're overclocking. Test with a Prime 95 blend test. If your computer crashes then you know it's not stable. Also make sure the temps don't go above 80C.