Yup I would definitely overclock it. Its too darn fun and it increases your single thread performance that is important for getting the most FPS since the faster quad phenoms beat the 6 core phenoms in FPS.
If your motherboard lets out magic smoke a replacement will be very inexpensive....Even one with a robust VRM/power delivery system.
2600k@4848mhz @1.4v CM Nepton40XL 16gb Ram 2x EVGA GTX770 4gb Classified cards in SLI@1280mhz Stock boost on a GAP67-UD4-B3, SBlaster Z powered by TX-850 PSU pushing a 34" LG 21/9 3440-1440 IPS panel. Pieced together 2.1 sound system