Hello Super, just changed my o.c to 4.73 GHz from 4.6 +. My temps under stress with IBT set at high for 20 runs was 67 Celsius package (core). By the way I am awaiting product introduction of the Swiftech H320. Much better than Corsair H100 the Swiftech H220 has an all copper radiator with a pump that 3 times more powerful than on the Corsair H100. It has 5/8 inch tubing That is wider and more flexible than in Corsair units. Did I forget the fact it is expandable you can add a second radiator and a GPU block. I had said I wanted the H320 because soon to be released H220 comes with 240mm radiator and the 320 when released will come standard with 360mm all copper radiator. The price for the 220 is about $149 for the H320 $176. These are closed loop pre-filled AIO liquid coolers that are expandable. Checkout the Swiftech forum on overclocker.com . I estimate my core temps will drop at least 8 degrees Celcius under stress with H320.