Samsung superfast charging and pc usb 20mbps port

[Conradfwebster]

I have a Samsung A54 and use a plugin superfast charger. I assumed that using the USB-C cable plugged into my Asus Rog Strix B660-Gaming motherboard USB 20mbps port would also provide superfast charging, but it only provides fast charging. Can anyone please explain?

 

[WelshBloke]

I have a Samsung A54 and use a plugin superfast charger. I assumed that using the USB-C cable plugged into my Asus Rog Strix B660-Gaming motherboard USB 20mbps port would also provide superfast charging, but it only provides fast charging. Can anyone please explain?

The motherboard usb can't provide the wattage needed for super fast charging?
The 20mbs is data speed, super fast charging relies on higher current/voltage than standard.

 

[mikeymikec]

USB-C is designed to handle up to something crazy like 100W, but not every USB-C port has that kind of power throughput available.

 

[Tech Junky]

USB-C

That's just the physical connector. USB PD can now go to 240W which you'll see for laptops that use such a charger. But, most PC based output still tops out at 100W and would be an aic with an additional power cable connected to the card. My TB card does this and gives 100W per port.

USB Charger (USB Power Delivery) | USB-IF

www.usb.org

 

[Conradfwebster]

Thank you for the explanation. Just when I thought USB couldn't get any more complicated.

 

[Tech Junky]

more complicated

Well, they did it again with USB 4 v2 instead of bumping to USB 5.