You have a H series motherboard and a K series CPU, the K- series CPU is a great overclocker, but the motherboard you have was not designed to overclock. You should really have either a P67 or a Z77 motherboard to get the best overclocking results from your CPU.
You may be able to overclock a bit using the H-series, but I must admit I know very little about them other than they were more of a budget board and not specifically designed for overclocking.
Your best bet is to do some research online for overclocking with your specific board, that should tell you one way or the other if you can get a bit of an overclock with it. But take your time and be sure to take in all the information before attempting it.
Hope this helps