Dell motherboard = no overclocking...I think.
Sorry to bring you the bad news
But, it might be possible. Just check your bios and see if any features are for overclocking.
I know as a fact i can OC on this board.
http://my630i.com/viewtopic.php?f=4&t=3219









and it idles at 33c or a tad higher underload about 56c plus i have 5 fans in case also 2-200mm top and front and 3-120mm 2 on sidepanel and 1 on back of case

