Is it normal thing 7C difference?
Yes, my 4 core runs at 7-8C difference between the coolest and warmest cores during encoding.
Is it normal thing 7C difference?
Well, i was running benchtests with each time i change cathe ratio and it does effect it a little, using cinebench r15 on 4.4 GHZCache ratio doesn't seem to have much of an effect on performance. I'd just change "auto" into whatever the default value is, and then see how high it'll go and remain stable.