Z790 dark hero - no NVME device found but can boot

[Minito]

Hello there,

I got a Z790 Dark Hero with a 14900KF.

I have a crucial T700 2GB installed in th M.2_1 slot and a samsung 990 PRO 2GB in the M.2_2 slot

Windows installed on the T700

I wonder if anyone knows why my bios does not detect any NVME device uder NVME controller and Drive information tab but can detect them under boot tab.

Anyone can help me with that? I looked over a lot of posts and google search and did not find anything to solve.

[Silent_Scone]

Hi @Minito, 

Seem to report fine here on the Apex Encore. However, I did just have a T700 fail on me which was causing some strange detection behaviour before I removed it. Perhaps see what happens if you remove the GEN 5 drive from the system?

 

[Minito]

Hello @Silent_Scone 

Thanks for your reply.

On my side, everything is running smooth and steady.

I have two problems that I though might be link to the issue above.

#1 My T700 is speed (3200Mb/s) is half my 990 Pro (close to 7000 Mb/s)

#2 I'm not able to update my 990 firmware with samsung magical, it just say that it cannot on the selected drive.

Is there any NVME controller driver of some sort that could be bad or mis-installed?

For sure I could live with those 2 problems but since I paid for a PCIe 5.0 M.2 disk and sacrificied half of my GPU lanes I would like to be able to benefit of the T700 max speed. Also note that I have full custom loop with a vertical GPU which block the physical access to those M.2s. I will exhaust every "software" options before any hardware options.

[Silent_Scone]

There's been quite a few teething issues with the T700. If you're running the latest BIOS, drivers off the support site, and the latest Micron driver then I would contact Crucial to see what they suggest. Beyond this, running in M.2_1 I was achieving full speeds.

[Minito]

Yup, just did. I see what they reply.

[Minito · Accepted solution]

Hi @Silent_Scone,

No one were able to help me either on crucial or Asus side. I have an RMA authorized by Crucial but before to send I decided to run some more testings and guess what, I found the issue.

For an unknow reason, the alt pcie switch was in 2nd mode... I never intentionally touch it so not sure if it was factory setting or I may have accidentally switch it in mode 2 while harnessting my vertical GPU...

I put the switch back to auto mode and now I my crucial disk running at its full speed.

I have to specify that after switching to auto mode I had a few other issues that I could explain if someone need. In the end, I had to reinstall my windows 11 and format both of my nvme drives to make that works.

Im just a bit disappointed that no ones from asus or crucial mentioned anything about that alt switch. Im not an expert at all and it is when I started to tear all down that I noticed that switch and wondered about its fonction. I read the manual and I was like, well it looks like it could be related with my issue.

Hopefully, this post will help someone else!