Concave/convex IHS, or try swapping your cpus into one another's identical setup and reassessing your temperatures.
Identical rig 1, E8400 #1, 1.27Vcore, 77C load
Identical rig 2, E8400 #2, 1.43Vcore, 77C load
to
Rig1, Cpu 2
Rig2, Cpu 1
See if you get 77C on both processors at load.
Bookmarks