You could probably bump the voltage up by 1.23 and up it to 4.4 Ghz, it worked fine on my i5. It could run intel burn test for 10 hrs on high. BTW, I was also using a Cooler Master Hyper 212 EVO
+1 I also say bump up that voltage by 1.23 and you should be able to get 4.3 or 4.4 out of it. The 212 Evo is a great cooler for the price I have my 3570k OC to 4.3GHz with temps around 50-55c at full load.