NVMe… dont know why is mentioned since its supported already.
Regarding AMIBCP tool, its not valid anymore for most of modern Aptio V bioses so for further “playing”, same as the follwing, to start:
([Request] Unlock hiden BIOS settings MSI MPG Z790I EDGE WIFI - #2 by MeatWar)
EDIT: “…but when I put any drive in it it just doesn’t accept it”
Any drive no… any NVMe can be.
Users cant come to ask a forum for help just saying “doesnt accept it” since the machine supports it by default, we are not siting at your desk to see the behaviour/messages/errors etc, the user must describe all possible details of the issue, in order to give the best elaborated “picture” of it.
“This was an enterprise machine so I’m not sure if options were removed…”
Enterprise or not… whats the point of removing performance of a NVMe drive…no logic and unlikely. Blacklisted drive model, badly seated, hw failure and last but not likely bios config.