you mean from a standard usb port/header on the mobo to a pcie slot adapter? no go.
the usb cables in risers just carry the pcie signals from the slot to the adapter. they do not use the usb protocol; the usb cables just happen to have enough individual wires and bandwidth to work so are convenient to use.
you could try a pcie port multiplier but not sure how well you could fit that in there.
Thank you for the information. Yes, that was part of my question "Can the standard USBs interface a GPU." Answer, No, Thank you.
Second part of the question. Does anyone have experience with these devices:
PCI-e Express 1X to 3 Port 1X Switch Multiplier HUB Riser Card +USB Cable 1PC
its working, but doesnt worth the effort and the money. i think only linux will user 7 cards, you will have problem winth windows. Its easyer to make 6 card rigs with win10 imho.
