i personally have had pritty good luck with getting my chip to 2.6ghz stable and 2.5 stable with stock vcore. when overclocked the only differance i see in performance is beacause of my ram and my chip at 2 or 2.6 really makes hardly any differance except in hl2 where 2.3 has sped up my frames so that there is no longer any probs on high settings.