As in title , i have i5 3570K overclocked , hm well not by me cause i have on my motherboard OC Genie II , anyway my processor is at 4.2 Ghz with this cooler https://www.silentiumpc.com/en/fera-2-he1224/ , while gaming temperature is about 75-82 degrees . Is it fine or i should change it back to stock speed ?