Well i have the FM2A75 Pro4 with an AMD ATHLON II X4 740 and its been here alive and running fine for just over a week...and its overclocked. There looks to be no doubt some kind of issue with sploding VRM but mine seems to be fine, VRM heatsink only gets warm, not hot, and this is after hours of Prime or IBT with my CPU at 4Ghz 1.352v and offset+0.024.
I'm thinking VRM going to the GPU is the one that's exploding, which could explain why your VRM temps are fine. (Not sure which of the VRMs actually go to the GPU, since this is just a guess).
*edit* actually, the gpu vrm burning out is very likely since it has apparently already killed someones onboard gpu(still assumption).
I'm also going to assume that the UEFI bios doesn't have a capped fps, or some other issue, that it causing the cpu to go into a max power draw state(I've heard of a few cases where simple programs can overheat components because of this). still just a assumption though.
Edited by Alanim - 12/10/12 at 5:30pm