Question Question about old legacy cases (Corsair Obsidian 750D)


Aug 17, 2019
I have a five-year old Corsair Obsidian 750D Full tower case which has two USB 2.0 and two USB 1.0 ports on the front panel. If i connect the front panel connector to the USB 3.2 Gen 1 connector on an ASUS ROG Crosshar Hero VIII AM4 motherboard will all four ports work or only the two USB 2.0 ports?

The question comes up because when i built the system, all four ports did work for a bit and now only the two USB 2.0 ports work. Device manager does not show any issues.


ASUS ROG X570 Crosshair Hero VIII AM$ motherboard
Corsair Obsidian 750D case
Corsair H115i Platinum RGB AIO cooler
Corsair CX750M Power Supply
Corsair 8 GB 3200 MHz DDR4 LPX RAM x 4
Corsair QL140 aRGBfans x 5
Corsair Commander XT hub
MSi NVidia RTX2070 GPU
Samsung EVO 970 1TB m.2 SSD


It should be noted that a 750D has two USB 2.0 and two USB 3.0 ports on the front. There were very few consumer things with USB 1.0 ports and USB 2.0 took over from 1.1 very quickly after 2000. Aftermarket computer cases weren't a big thing back then anyway. In the case of Corsair, they didn't make a case until 2009 and certainly never had a case with 1.0 or 1.1 ports.