A 1600W PSU (XPG FUSION 1600 TITANIUM (https://www.xpg.com/us/xpg/pc-components-fusion)) and four RTX 4090. But it's not clear on the video if the four RTX 4090 are loaded (FurMark (https://www.geeks3d.com/furmark/)) or only two or three of them. Because we see around 1300W for the GPU power (GPU [W] on the video).
- The Most Bonkers PSU I've Ever Seen!!! [XPG @ Computex 2023]
(https://www.geeks3d.com/public/jegx/2023q2/computex-2023-xpg-1600w-psu-four-rtx4090-furmark.jpg)
(https://www.geeks3d.com/public/jegx/2023q2/computex-2023-xpg-1600w-psu-four-rtx4090.jpg)
- 4x 4090s, ONE PSU!! | Liquid Cooled GEN5 SSD? - XPG Computex 2023