OK, now have vcore at 1.2875v (might try lower still if its happy overnight ....). With the case closed back up this peaks at 80DegC (ambient 27.5DegC), so I think the Raven and the Frio should bring it back into the mid 70's, where I'd be comfortable. +1 rep for the useful details What QPI voltage do you have for your OC @ 4.2GHz?
Thanks for the rep QPI I believe I have set at 1.28v, but that was just a guess. I read that it needs to be at least 0.5v below the vcore.