>>106249577
I'd like to say you're onto something, but those ASMedia 1166 chips are mediocre. You can buy something like picrel and get a proper LSI 9300-8i HBA if 8 drives are enough for you, a half height card on top will make it be full size while still having space for two NVMEs. It requires x4x4x8 bifurcation, which your mobo should be able to do