By the way I tried different Clock Twister settings using Everest bandwidth bench, and for some reason you only gain performance benifits going up from "Light" to "Moderate", but then performance goes down using either "Strong" and "Stronger". "Lighter" essentially means this internal timings tighening is turned off, as there is a relatively big performance drop off going from "Light" to "Lighter".

So basically for best performance use "Moderate" Clock Twister settings, at least untill a BIOS fix this issue...