We've had motherboards for decades with supplemental power, it just used to be a 4 pin molex instead of an 8 pin PCIe connector. It probably was more useful in the past than now when people were running a couple GPUs along with other PCIe cards.
DISCUSS!
I don't think I've seen this mentioned anywhere. Is only MSI using this? Maybe they figured it IS crazy to rely on a single cable to provide all the power so they took the initiative to show the way to the rest of the industry? Or should we look for "ATX 3.1 ready" motherboard with supplemental PCIe power connector next time we are shopping?
LOL... I'm pretty sure my cooling system can pull 100W running full out though it's not on the MB. A couple D5 and a dozen fans plugged into the MB instead of a controller and I bet you could get up there pretty easily.I smell crap from start to end. Good luck overclocking your fans to use 100W.
Still, the biggest use of something like that would be someone using a slot powered card like an RTX4000 Ada SFF. 70W for the GPU, maybe another 15-20W for a RAID card, all the other 12V the MB needs and then a few system fans and all of a sudden that's a pretty good draw from the two 12V wires on your 24pin.