Intal and AMD build their chips with higher VID than are actually required to operate, the idea being that this will be the highest (thus controlled) voltage a mobo will put through it. In reality they both plan for horrid vdroop on the cheapest boards but this mean voltage will only drop, and never exceed the VID i.e. they can guarantee the stability and lifetime of said chip. LLC is supposed to fill the void and move said horrid vdroop completely. Now there are three problems here.
First, neither Intel nor AMD support LLC and their engineers would have to be pretty damned poor to have never considered it therefore there has to be some reason they never used it, but have never given any.
Second, to fill that void it means a mobo has to put more voltage though when the chip switches states to compensate. Conversely it means when the chip switches down states then there's, in theory, more power going to the cpu than needed (or conceivably safe).
Third is the simple lack of any real testing. Iirc then there have been at least 2 places which have tried some testing of llc and found tiny spikes, far exceeding the maximum safe voltages but both felt they lacked oscilloscopes with a low enough response to be 100% sure of the lots of tiny spikes theory.
On old boards there was simply an llc on/off option (might have been on p5q, it's been a while) with it on by default but now there's increments. The last Asus board I played with had it at 50% by default. Despite the lack of raw data there are a couple of reasonable assumptions. The fact that Asus ships with it on by default means it is safe, because they'd obviously be responsible for killing chips if it wasn't, and that's bad for business. Although chips have a 10+ year lifespan the guarantee is only for 3.
Also, that higher end boards with good power regulation, like yours (8+2), will be supplying a stable enough voltage for it to be safe. Having said all that, I'm sure there are plenty of Asus owner who probably don't even know it's on, and I've never heard of a single chip die as a result of it. Vdroop doesn't seem to be such a big issue these days anyway. This cheap, non solid cap mobo I'm using is set at 1.35v and put out 1.344v, unlike ones from three years back when you'd set 1.3v and be lucky to get 1.24v.
Worst case scenario is you have to tell amd you bios setting were at default - which is completely true.
Very interesting info tho, especially azuse, thanks for the essay, (no sarcasm intended) it was very informative 