Since buying this gpu six months ago I've had nothing but problems with both its shape / size & evga's proprietary software Precision X1 which is needed just to get all the fans to spin.
The problem: After shutting the computer down for the night the next morning the GPU wont post and the system doesn't recognize the gpu as installed. THe computer itself will post just fine, but device manager will not recognize that it is installed and neither does it show up in the graphics section of UEFI. THe most frustrating part of this is the workaround. Shutting the computer down and then cycling the PSU switch makes the gpu recognized by the system!
It would be less frustrating if it was a hardware issue since originally I thought the weight of the card itself was putting too much strain on the PCIE slot. Sometimes when I took the machine apart for cleaning or upgrades the gpu wasn't seated correctly and reseating it worked. I recently modified my case to have the gpu mounted vertically which has aleviated the seating issue but this problem still persists and has gotten more frequent with every nvidia update.
When the card is recognized by the system if performs great with no errors, and this is frustratiing as well. I can't tell if its the card being defective, something with the mobo, a software issue, etc. Playing games and putting a heavy blender load on the card doesn't yield any errors.
 
If anybody has experience with these problems please share your insight.
 
System info:
Asus ROG Strix 370f
i9 9900K
32gb corsair dominator platinum RAM
EVGA 2080ti FTW3 Ultra
PSU is a EVGA G3 1000

Definitely sounds like it could be a faulty riser cable.  What brand/model is it?  You could try putting the card back in the motherboard and getting an anti-sag solution like this one for it.  I'm using one to actually help provide support in a vertical mount config though I think it's really intended for the standard motherboard mount.  It's a pretty solid little device and you can easily leave off half the height if you don't need more than that as the support stick is two pieces. https://www.amazon.com/upHere-Graphics-Anodized-Aerospace-Aluminum/dp/B079HSVSLR

roache808
Since buying this gpu six months ago I've had nothing but problems with both its shape / size & evga's proprietary software Precision X1 which is needed just to get all the fans to spin.The problem: After shutting the computer down for the night the next morning the GPU wont post and the system doesn't recognize the gpu as installed. THe computer itself will post just fine, but device manager will not recognize that it is installed and neither does it show up in the graphics section of UEFI. THe most frustrating part of this is the workaround. Shutting the computer down and then cycling the PSU switch makes the gpu recognized by the system!It would be less frustrating if it was a hardware issue since originally I thought the weight of the card itself was putting too much strain on the PCIE slot. Sometimes when I took the machine apart for cleaning or upgrades the gpu wasn't seated correctly and reseating it worked. I recently modified my case to have the gpu mounted vertically which has aleviated the seating issue but this problem still persists and has gotten more frequent with every nvidia update.When the card is recognized by the system if performs great with no errors, and this is frustratiing as well. I can't tell if its the card being defective, something with the mobo, a software issue, etc. Playing games and putting a heavy blender load on the card doesn't yield any errors. If anybody has experience with these problems please share your insight. System info:Asus ROG Strix 370fi9 9900K32gb corsair dominator platinum RAMEVGA 2080ti FTW3 UltraPSU is a EVGA G3 1000

Too shorten troubleshooting, the fact it is an initialization issue means it is, in some manner a hardware issue. There's no software drivers being loaded at that time.

plug GPU into the MB to confirm issue is Card, MB or riser

It is the kit from phanteks. It was doing this when I had it plugged directly into the mother board

Could be a bad power cable if the gpu isn't lighting up when starting the pc.