The vdroop is probably hurting the overclock. Try a bit more vcore, but then again, you're already right at 70C. Maybe try a cooler reseat as well? that's really hot for that voltage and clock speed.
Originally Posted by BradleyW
thin layer then smoothed with my finger in a plastic bag. ive been running 30 mins now on prime. i know whats casing one core to be slower than the other, whenever i increase vram my cpu is a little slower in benchmarks. this may be the problem. my vcore in cpu-z jumps from 1.344v to 1.360v and back down. not sure why, all energy saving features have been switched off.