nzxt krane

i7 10700k, nzxt kraken 360 so x3 180euros rtx 3070. gpu is fine, but cpu reaches 81c when i play efootball pes 21, dota2+lost ark around 75c. No overclock from me all are from stock and its summer though but 81c seens too high. Therma paste dead cooler? bad mobo cpu?, asus prime z490-A.