I wanted a founders editon card for a while now but never could find one in stock, not that I was looking that hard, but now all of a sudden they had 5080's and 5090's in stock so I jumped on it, they are among the cheapest you can get, otherwise it would have been a palit or gainward card...
How many times has AMD been dead and buried b4 they came up with ryzen?
Seems ro me that a lot of people are keen to see intel fail as they used to be the big dog, that does not mean they will.
I would start with updating the bios and go from there, don't see any point in doing a windows install prior to that for the old hardware, you don't need windows to update a bios.
Do make sure that you don't skip any bios updates as sometimes you need to do a couple older ones first
Well if I'm feeling adventurous I'll try the latest drivers as the settings don't stick with my hotfix ones and see if it makes a difference, did a few benchmarks without rebar already on BL3 and div 2