G bios working well here.
Tested 6 modules and all six can run single channel, inside slut, waza stable with RTL 49 6 @ 4133 12-11-11 tight. Voltage range from as low as 1.9v (1.97v real) - 1.94 (2.01v real).
Resort the rest of my b die on this bios, as it seems to work really well with 9900k.