AMD doesn't have 3090 class card. Nvidia will probably be alone at the top for a bit longer.
This could also be a preproduction PCB that was given to overclockers. Also, the stock edition is rumored to be 350W card. Could be a vendor card. MSI had 3 pins on their cards and they didn't need it at all. Just a marketing gimmick. 8+8 was more than enough for any ambient cooled 2080Ti.