So my Intel 900P optane SSD (X4 PCIE card)keeps disappearing on reboot now. I suspect the motherboard because I did have the Intel software installed that showed it at 100% health. I've moved sockets, and removed one of my video cards, set motherboard settings to default, etc. Still, 90% of the time the SSD just isn't seen in the motherboard in the EVGA BIOS settings.
 
I will try it in a different computer when I get the chance, but anyone have any suggestions?
 
EDIT: When it is there, the computer boots and runs fine until the next restart.

arestavo
that may be causing the SSD to disappear?

Wouldn't think so, but maybe.

Oooooof. Now I'm having random USB disconnects. Sometimes just my KB/mouse (on an extension so both are same port), and sometime those plus my wireless headset.
 
Moving to a different port, and changing the wireless headset didn't help. Although it seems like it's happening less often.

Are there any motherboard voltages that can mess with the USB like that? Everything is at stock/auto voltage except for the RAM (has to run at 1.4V now, even at JDEC 2133MHz) and the CPU's VCore at 1.19V.
 
I did try and clear the CMOS, and with the wireless headset swap it *appears* that the fairly consistent UBS disconnect and reconnects have stopped (for now).

So, everything is stable and working at my old settings - except for the boot loader. It cannot work with CSM on and storage set to legacy, even though that's how Windows was installed and how it worked since installing this X299 FTW K. I can set CSM on and set storage to UEFI, and I can set CSM off completely - and everything loads fine (other than the fact that I can't see my Adaptec 8805 drive discovery or get into it for configuration purposes).
 
I'm not sure what M$ did, but they definitely changed how things interact and they did it by touching the UEFI settings on my motherboard. Huge UGH.