No dual bios...it's the 3080ti XC3 ultra. Got the 3080ti bios at techpowerup, along with nvflash (maybe I got the wrong ones?) They do a blanket file that's supposed to cover so many models, but sometimes they don't. It's a possibility I guess. Is there a better place to get them? Maybe I need to do that, try somewhere else. Thought they were the latest bios, but just went in to search and can't even find the Ti now, just the 3080 blanket versions. Already cleaned out the nvidia driver before starting this whole mess. Even tried installing an older version at one point, just to see. Unfortunately it's vertically mounted, not horizontal. So adding the 1070 back in, even to test it would be a serious pia. At least it doesn't void the warranty if I end up having to ship this pos back. Just wish I could figure it out. 2 years of waiting, moved 900 miles and now this.