After watching Gamers Nexus teardown of the 3080FE, I'm thinking that removing the silver outer shroud on the 3090FE might give us the clearance we need to squeeze it in the T1 if it won't fit natively.
A side effect being it looks pretty sweet, at least in my opinion for a black T1! Still taken from Gamers Nexus's video, you can see what I'm taking about removing in the lower right hand corner there, what do you guys think?
Didn't Steve say something about the outer shroud providing some benefit to channeling airflow, though? Forgive me if I'm misremembering-- I haven't watched that teardown since before release madness seized my entire being