M.2 SSD is not recognized by BIOS

Question

I am getting desperate with my brand new setup.

• MB: Gigabyte B450 AORUS M
• SSD: Samsung 970 evo 250Gb (M.2 under the GPU)
• HDD: Seagate Barracude 2T (SATA)

I got my PC built by seller. It came with windows on SSD, working fine, but with HDD not detected in Win nor in BIOS. Then I started messing arround, but nothing worked. The only way to see HDD was the situation, when I unplugged SSD. But when I plugged SSD back, it was not showing up. They just switch roles.

And now I can not see SSD no matter what I am doing.

BIOS is flashed and actual, I tried all kinds of restarts, setting changes, secure boot keys removing, battery unplugging, HDD unplugging and more...

But still I have no chance to see SSD. I installed windows on HDD to somehow try solve it from running instance, but still without results.

What do you think about it? Is there a chance that it's still about some kind of settings? I don't think I can damage ssd by a few gentle unmounts.

Solution

Fixed. This solution worked for me.

• Unplug every disk you have
• Eject motherboard battery and wait 30 sec.
• Put it back and connect only SSD
• Boot into BIOS and set Optimized default profile
• Save and exit - reboot

... and disk was visible.

HDD must me plugged to SATA connector, not ASATA! ASATA's share bandwidth with PCIex4 SSD NVm, so they are not working together and first connected has priority.