Alright, after a bit of testing. I bumped the volts up to 1.3 on my 4870, hits 840/1100 stable just fine and lives for 15 minutes in furmark. Problem being, it gets a VPU crash within seconds when I try to play FEAR. 820/1050 is the max stable for that. This is at the same 1.3v. The temps are quite a bit lower than the furmark benching too. At stock volts both furmark and FEAR fail at the same settings, so I don't know what's up. Any ideas?