Only tried the new 0604 bios updated from 0505, and my 333strap coldboot problem seems to be gone. Previously i had to turn off and on the psu before booting the computer left off overnight, or it would crash in 3d. Also Vdroop is gone, completely and the pc is more stable overall. I set 1.45 in bios and i get 1.48v. Measured with a multimeter and also no droop in load.
with 0505 i had to set 1.55v to get 1.45v, both idle and load. I'm measuring from the spot showed in VR-Zone's article.

Tried SuperPi and it seems a bit slower tough.