This fix was actually the first we tested from AMD, though it wasn’t enough to alleviate the problems with power draw from the PCI Express connection. This adjustment does nothing to change the weighting of power draw from the two +12V sources and instead only focuses on lower total power draw of the GPU. Yes, this does mean that there are going to be some cases where performance drops, though I have seen articles talking about performance increases with undervolting.
AMD indicates that we should think of this setting as a secondary solution, one that is NOT enabled by default, for any users that might be overly concerned about power and current draw on their motherboard or power supply. As I will show you in our testing, the differences in power draw are definitely measurable, and performance seems to be impacted minimally in the couple of spot checks we have done.