What AJ is saying is that board is weak where voltage is stepped down from +12V to the Vcore you set in bios and then must regulate the current thru the VRM (voltage regulation module) to supply current to the board at the set voltage. In general the more power phases of the VRM circuit, the 'beefier' the board is and able to handle that power draw cleanly, accurately and effectively. Cheap and cheaper boards today are not built to withstand the power of 6 core FX's and certainly not the current hungry 8 core FX's when pushed under heavy current loading.
The problem with some of the earlier and probably also today's cheap MSI boards is that the Mosfets in the VRM circuit actually vaporize, explode nearly and a chunk of the outer shell of the mosfet just disappears due to high current passing thru it. Not funny for sure if it takes other components down with it.
Now that is what AJ is talking about. Your board would have likely been just lovely for a 4 core denab processor, but is likely very under-built for the rigors of REALLY pushing a 6 core or 8 core FX processor. Just not beefy enough construction in general.
EDIT: And that board would do quite well if you got overclocking off the brain. Or a reasonable overclock. You could put the 6100 in the socket of that mobo and run it as AMD built the processor to run and be used and the board could run nearly forever or as long as a mobo is expected to run.
END EDIT.
If you keep trying to go higher and higher instead of staying at a reasonable 4.2Ghz if it is truly stable there and is not needing much more than 1.475 Vcore, then you could have board failure. OR in this is truly a possiblity, you get just a little faster and it becomes a very much trial and error to find stability because the power to the cpu is not effective and you can hardly see it without a scope and we all run around in circles chasing our tails looking for why the stuff won't go faster. Neither the first nor the second result is worth a crap. About it, overall.