Thx for that insight Particle. Being as the psu is a bfg 450w and the 12v rail never drops below 12.11v Im convinced its the mobo.
I have some cheap heatsinks on the mosfet and a 120mm fan right on top of them but they still get pretty warm. No fan on them its dangerously hot as well for the vrm's.
Ive undervolted it to 1.3v from 1.37v at stock clocks to just lighten the load on the board, as I let it crunch 24/7 for this weeks SuperComputer challenge.