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Z790 Maximus Hero and Hyper M.2 Gen 5

Level 7

I have a Z790 Hero with a 13900KS, 7900XTX and now 2x Crucial T705 PCIe 5 M.2 drives in a HYPER M.2 X16 GEN5 card..

Hyper M.2 Card is in PCIEX16(G5)_1 slot
7900XTX is in the PCIEX16(G5)_2 slot

1st T705 is in M.2_1 slot in the hyper card.
2nd T705 is in M.2_2 slot in the hyper card.
No other drives are in the system/hyper card.

I have enabled bifurcation x8/x8.
VMD controller is enabled.
MAP PCIE Storage under VMD is enabled.
BIOS version 2202.

My issue is that no matter what I do, I can not get the system to see the second drive. Is it not possible?

I have read the motherboard manual, hyper card manual, T705 manual, and spent hours searching. Can anyone guide me through this? Ultimately, I want to setup RAID0. I can't get the system to recognize the second T705 drive.


Level 8

Bios default and reset.

Might be bifurcation not implementing at x8. Can try with x4x4 config also 7900 taking full x16 lanes affecting second drive at x8. Try putting both without hyper card to test them....

Bios was updated yesterday.

Bifurcation only has 3 options, Auto, x8/x8, x16. No x4x4 options found. 7900xtx is confirmed to only be running at Gen4 x8.