So I had just started using this card and I monitored the temps like a nervous hen for awhile but quickly realized that this card was perfectly stable and running at between 26C - 63C. Then it just stopped working. I tried rebooting a few times but nothing other than my CPU cooler flickering at the power surge of being turned on for a brief instant. Then I noticed the red light turned on at the 3rd power connector from the card corner and began talking to friends who build systems for a living and was immediately told of this, "Red Lights of Death" epidemic among these RTX 3090 FTW3 Ultra Gaming cards. I just got this thing! 
UPDATE: Put in a ticket after realizing nobody at EVGA to answer the phones. So tired of feeling like I am constantly on pins and needles with these GPU issues and just want it to run correctly for years of enjoyment!