I really dont want you to do that. But for me it was the only solution to handle the BS.
Everything else like on your card didnt worked.
I know the following solution is maybe not the best, but its oviously better than a useless blackscreening card.
Flash PT1 or PT3 Bios. Cant remember which of them had no Vdroop. Take the PT wich has Vdrop.
And you will have some nice days with your card. (only if you have a reference card, works maybe on some
customs... but no warranty for that)