Z590 Extreme NVMe SSD not seen in UEFI

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   New guy here.

I have a Z590 Extreme MB and gen 10 processor (10770k). It has bios updated to 2.22 today, the latest version.

It's been running for years and today I fitted an NVMe which was not seen in UEFI by the mobo, this is a fairly common thing it seems.

Specifically, Samsung 990 Pro 1TB into the M_3 slot per the manual. I understand its PCIe 4, but mobo manual states it is backward compatible with the PCIe 3 slot. There is nothing fitted to the two SATA slots which the manual states will be affected by using m_3, sata 3_4 and 3_5.

I note NVMe of many brands not working is common for a variety of reasons, none of the solutions offered I've seen so far are available in the Z590 UEFI config.  

Any advice for what I suspect is a known problem?

TIA.

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keithh Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Jan 2026 Location: Brisbane SU Status: Offline Points: 60	Post Options Post Reply Quote keithh Report Post Thanks(0) Quote Reply Topic: Z590 Extreme NVMe SSD not seen in UEFI Posted: 05 Jan 2026 at 7:52pm
	New guy here. I have a Z590 Extreme MB and gen 10 processor (10770k). It has bios updated to 2.22 today, the latest version. It's been running for years and today I fitted an NVMe which was not seen in UEFI by the mobo, this is a fairly common thing it seems. Specifically, Samsung 990 Pro 1TB into the M_3 slot per the manual. I understand its PCIe 4, but mobo manual states it is backward compatible with the PCIe 3 slot. There is nothing fitted to the two SATA slots which the manual states will be affected by using m_3, sata 3_4 and 3_5. I note NVMe of many brands not working is common for a variety of reasons, none of the solutions offered I've seen so far are available in the Z590 UEFI config. Any advice for what I suspect is a known problem? TIA.

keithh Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Jan 2026 Location: Brisbane SU Status: Offline Points: 60	Post Options Post Reply Quote keithh Report Post Thanks(1) Quote Reply Posted: 06 Jan 2026 at 12:39pm
	Problem is solved. The manual is not especially clear on the numbering of the slots and it's not obvious which one is M_3. It's the one farthest from the processor as it happens, makes sense it's near the PCIe slots. They are not as you may imagine numbered left to right. The slot near the processor is M_1 and the one under the video card is M_2. I put it in the correct hole and it fired right up. Some gotchas, the board supplies two heatsinks, one each for M_1 and M_3. If you don't need them, then you will need something to take up the gap between the standoff and the card itself. I used cardboard insulating washers to do this. All good anyway.

keithh Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 05 Jan 2026 Location: Brisbane SU Status: Offline Points: 60	Post Options Post Reply Quote keithh Report Post Thanks(0) Quote Reply Posted: 06 Jan 2026 at 12:41pm
	The manual for anyone interested. https://download.asrock.com/Manual/Z590%20Extreme.pdf

Xaltar Members Profile Send Private Message Find Members Posts Add to Buddy List Moderator Group Joined: 16 May 2015 Location: Europe Status: Offline Points: 32783	Post Options Post Reply Quote Xaltar Report Post Thanks(1) Quote Reply Posted: 06 Jan 2026 at 3:17pm
	Glad to hear you got it sorted out. Thanks for the update