hello i have a i5 4690k @ 4.6ghz in a custom loop with my 2 480mm rads and a 240mm rad no gpu yet my idle temps on core 2,3,4 are 16-20c but core 1 is 27 to 30 roughly 10 more now i know my idle temps are good but would deliding the cpu and putting fresh thermal paste on and reliding it fix this or is it normal thanks