I flipped the bios switch on the cards - I have managed to get through the heavens benchmark without a crash so far.
Btw the overlay does not get capture in the screenshot when I hit F12 and if I use print screen it only captures the desktop -_-.
There is no Uber mode on 290 Pro cards. I think the second bios is Legacy instead of UEFI though. Maybe that was the reason for the crashes??