Computer Experts - Assistance Pls

Thanks. I figured after an hour of research I’d have a handle on this but there’s still a zillion questions. Growing respect for these computer nerd superstar people.

Normally I would agree but business expense cheapness trumps coolness.

Figured that was the case. I wish there was an easy way to confirm. Newegg is reluctant to except returns on this kind of stuff.

I assume PCIE 2.1 works with PCIE 1, just like PCIE 2.0 does?