Soric, I suggest you do some reading before messing with the BIOS, and it doesn't sound like you know what you're doing - no offense.
Read your motherboard manual, and then at least 2 overclocking guides on the Web, just do a search on Google.com. You should measure the CPU temp. when running non-overclocked, then compare it to the overclocked temp, and see if it went up too much.
Also, it's customary to provide the temp. in both F and C, not everyone here understands the F..