If it is in a case:
 
test with all attachments removed from MB to case
 
still not working - remove from case completely
 
CPU & Cooler + 1 RAM & GPU
 
 
 

Your familiar with this  
 
https://xdevs.com/guide/e399ocg/

EVGA Z390 DARK toolbox - OC software, tips and tricks, BIOS profiles, etc.
 
 
EVGA OC Lab
This is an area of the Forum to get some Help also ---> Ask questions about your OC
 

So, let's start back at the beginning.  Does it boot normally if everything is at stock settings?  If the CPU is at stock, can you run the RAM at the rated speeds?
 
If so, did you manually step up the overclock until you hit 5ghz, or did you try using the settings from your previous board?

Which SSD?  (SATA) M.2 or actual SATA port? If the latter, are you using the ASMedia ports or Intel ports?

The funny thing is. When im connecting a ssd with a system on it ... i can see the boot partition in the boot options and it boots to the system but it doesnt show me the drive under sata config

CustomRigs
The funny thing is. When im connecting a ssd with a system on it ... i can see the boot partition in the boot options and it boots to the system but it doesnt show me the drive under sata config

I've seen a similar issue with the Samsung 950 Pro M.2 SSD.  Another member mentioned they saw it as well, including on other brand boards. 
 
Edit:  In other words, it might mean something, but it also might mean nothing.

I'd give it a shot.  Also, if you haven't tried, you can always switch to a different BIOS on the motherboard, put your settings in again, and see if it works that way.

I tryed my teamgroup again. Its shown in the bios ... if a try any of my crucial SSD it makes trouble with slow boot and bios freeze also all of my three crucials mx100 and mx500 didnt work.

Curios tonight my mx100 was working oO and at the morning i booted and it dont work. Now i connect the teamgroup ssd and all is fine.

Is there trouble with the crucial controllers ?

I am having all kinds of trouble since switching to the KF with my Z390 Dark. I've re-flashed the Bios 4-5 times and reinstalled Windows 4. I am back up and running but at default settings. I believe my IMC is not as good as the 86K I was running, but something is seriously going on here with this combo. Most manual memory setting either never take or do take and are unstable and/or corrupts the bios and/or Windows. Last night the system became more and more unstable to the point where it would post, but immediately BSOD. Inside the bios, my mouse skips and everything input lags with instability. This was with default settings. I started a thread when I switched to the KF. Nothing has changed except I can reinstall Windows and refresh the Bios and start over. Overclocking the RAM takes hours for it to take and if it does take, don't mess with it or everything becomes unstable and will not boot unless you can get back default settings, a reflash bios, or complete bios and Windows install.
 
edit: Not using an Evo...system was fine before the switch
I swapped out every part before reinstalling Windows and bios today, except the case or CPU, just to see
 
 

No external devices with separate power source. Yes fast startup is disabled. This is a bare system mostly for benching. It was difficult to tune the memory with 1.04 with the 86K. 1.05 made it no problem and 1.06. This new processor and mb with this firmware is not working out so far. It could be the IMC as I’m just getting to know this chip. I believe it,s the firmware at this point. The system has been running without issue since 1.05. The moment I add the processor I was BSOD immediately after post. I reflashed, reinstalled, and was running. It took a couple of hrs for memory setting to take and was never able to set up my pre chip swap settings to take. Yesterday and today was spent trying to run default and two complete reinstalls. Same system as before.

Z390 Dark
9900KF
Gskill 4000-17
2080KingPin
970 Pro
1600axi
Corsair mouse and keyboard
Hwinfo hwmonitor classified tool px1 3dmark necessary intel drivers Nvidia 125.31 drv and PhysX

Hi Custom, let me also have our MB team look into this.  Go ahead and get started on the RMA process, but I'll have the team check anyway, since this is the second board you've experienced this issue.
 
I can tell you that your previous board did fail testing, but I don't have further details on what exactly failed.

ahhh and i have a look these days if i get a freeze in the bios
i thing i still get bios freezes (was two days ago ^^ )