After much research. Grr. This is what I've found. So far Asus, ASR, Giga seem to be slightly guilty, couldn't find anything on MSI or Biostar or SuperMicro. When Am3+ first came out, that's when the Rev 1.0 boards were released, but AMD did a serious rush job on getting those cpus out, so many bios did not have full support for the FX, it simply didn't exist. Mobo vendors weren't happy, but that's all they had to work with at the time. Didn't take long to realize the R1.0 were a little lackluster, so those boards were basically shelved and the R2.0 boards were pushed, having better power facilities and availability to use the 125w cpus that were now out. Because vendors pretty much wanted to forget about the disasters of the R1.0 boards, nothing like cpu compatibility websites was updated, although bios releases for Viscera cpus of 95w, be it 4,6,8 cores were released. Almost silently. So while many of those R1.0 boards don't specifically list actual compatibility on the website, officially, unofficially they do support Viscera 95w cpus of any core size. It's sneaky, shady, however you want to call it, it was just a bunch of Cover Your A. How far exactly this extends, I can't find, but it pretty much starts with the underwhelming addition of the FX lineup from AMD originally.
So, as to why the cpu/VRM's is overheating has little to do with the bios, other than voltage settings, and more to do with physical limitations such as needing thermal paste redo, fan curves set right, good case maintenance, improved airflow, etc. Could be any number of things or a combination of a bunch of things.