Wow, very detailed explanation for resolution! This worked for me and hopefully, others will see this post. I have found a lot of posts with no resolution.

I have switched cables/risers with the other cards. Tried different slots on the MB. I do have an EVGA Supernova 1200P2 PSU I'm using. I'll connect another PSU to the 5th card and test it out. Thanks!

I'm building a rig with all 3070 cards. The motherboard has 6 PCI slots. I can fill 4 of them without issues. When I add the 5th card it starts up, then shuts down within seconds. This repeats until I power off the rig. I have disconnected all the drives, then tried to add them one at a time. Still,...