hmm, don't put your vCore to anything more than 1.7v.
I am not to familiar with intel's so forgive me if this is a bit off...
Go into the bios, usually just press delete key repeatedly when turning on computer (before the windows start up screen)
Make your way to the clock frequency section, say that the multipier is 15x I really wouldn't touch that, to get more bang for your buck raise the FSB to about 10Mhz above the normal.
Save changes and exit, if you get past windows boot screen, yay, go and download super pi and calculate to 8m dp(radeonx.superpi.com or something like that, just type it into google) or just try a stress test...if it crashes ,usually a BSOD, go and lower the FPS in the bios. Repeat the steps if the same thing happens
Go as high as you want to go but i really wouldn't think that a n00b would sustain 4GHz on air
Make sure to monitor the tempuratures so your CPU doesn't burrrnnnnn.
I take no liability if your computer dies.