That was too much. I hope you applied in your 2nd try less than in 1st. Higher voltage comes from PBO manual Scalar X9, you wrote you have there. Anyway, this looks already "acceptable". You are not going to torture it in games like that. - - - - And from images, I think I know the problem. Either CPU's IHS or cooler's base is bulged out in center. That results in very good contact in center, but bad around edges. And your CPU DIE is not at center, but in "corner" where you have thick TIM layer due to space.