I have an Asrock B650M-HDV/M.2 and I've just gotten another NVMe since the mobo has 2 M.2 slots, so I wanted to expand the storage a bit. The board has a topmost M.2_1 Gen5 slot with a heatsink, and an M.2_2 Gen4 slot under the GPU that's just using one screw to hold the drive.
The issue is that the new drive, which is a Gen4 LEXAR 1TB NM790, isn't working at all in the lower slot, and the old drive, WD Blue SN550, works in both, but frequently disconnects when used in the lower m2_2 slot after PC goes to sleep. These are Gen3 and 4 drives so they should both be working in both slots, I'm not sure why Lexar only works in the upper one or while SN550 is disappearing when used in the lower slot and after the PC is put to sleep. It's only possible to get it back after rebooting the PC.
There should be no slot sharing with SATA SSDs with this mobo from what I understand, and all of them do definitely work together for a time (with SN550 in the lower slot and before it disconnects), and both drives also show good health with 96% and 100% and no critical errors.
Also, the SN550 was having this same issue (randomly disappearing) for a short period of time when I was using my old B450 Tomahawk Max mobo, but then it stopped and it wasn't happening for a year until I switched mobos. It also never happened with this B650M-HDV/M.2 mobo while it was the only M.2 drive seated in the upper heatsink m2_1 slot, so it seems there are 2 different issues I don't understand:
The issue is that the new drive, which is a Gen4 LEXAR 1TB NM790, isn't working at all in the lower slot, and the old drive, WD Blue SN550, works in both, but frequently disconnects when used in the lower m2_2 slot after PC goes to sleep. These are Gen3 and 4 drives so they should both be working in both slots, I'm not sure why Lexar only works in the upper one or while SN550 is disappearing when used in the lower slot and after the PC is put to sleep. It's only possible to get it back after rebooting the PC.
There should be no slot sharing with SATA SSDs with this mobo from what I understand, and all of them do definitely work together for a time (with SN550 in the lower slot and before it disconnects), and both drives also show good health with 96% and 100% and no critical errors.
Also, the SN550 was having this same issue (randomly disappearing) for a short period of time when I was using my old B450 Tomahawk Max mobo, but then it stopped and it wasn't happening for a year until I switched mobos. It also never happened with this B650M-HDV/M.2 mobo while it was the only M.2 drive seated in the upper heatsink m2_1 slot, so it seems there are 2 different issues I don't understand:
- Why is WD SN550 disappearing randomly when seated in the regular M.2 slot with a single screw (both old mobo and current one)?
- Why is Lexar NM790 not working at all when seated in the non-heatsink slot?
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