> > > On Oct 23, 2019, at 11:05 AM, Rich Shepard <[email protected]> wrote: > > > > ?The Asus Prime X470 motherboard in my desktop has several USB ports. It has > > AMD Ryzen 2nd Generation ... > > 4 x USB 3.1 Gen 1 (up to 5Gbps) ports at back panel (blue), > > > > AMD X470 chipset > > - 1 x USB 3.1 Gen 2 (up to 10Gbps) front panel connector > > - 2 x USB 3.1 Gen 1 (up to 5Gbps) ports at mid-board > > - 2 x USB 3.1 Gen 1 (up to 5Gbps) ports at back panel (1 x Type-A and 1 x > > Type C) > > - 4 x USB 2.0 ports at mid-board > > > > ASMedia USB 3.1 controller > > - 2 x USB 3.1 Gen 2 (up to 10Gbps) ports at back panel (teal blue) > > > > I want to understand how all these differ and which to use for what. > > Pointers > ... > > Rich > > In general, if the plug fits you can plug in anything anywhere. Usually > it?ll run just fine. Higher speed ports are generally backward compatible, > and most older slow devices will work in a faster port. Now the key is > SPEED. It makes no sense to plug a keyboard or mouse ( usually USB 1.1 or 2) > into a usb 3.x port. you should match the external Device speed with the > port. Why plug a usb 3.1 gen 2 external hard drive into usb 2? > > It?s just that simple. Not rocket science.
Until it isnt that simple. I have seen cases of USB 3.x flash drives that actually wont work in a 3.x plug, but work fine in a USB 2.x plug. This is usally on early generation 3.0 systems using a late generation 3.1 USB device. YMMV, be aware, not all things are as compatible as the standards say they should be! > -Ed -- Rod Grimes [email protected] _______________________________________________ PLUG mailing list [email protected] http://lists.pdxlinux.org/mailman/listinfo/plug
