That power is at 5 VDC and limited to not more than 0.9 A total load. What you call a "USB 3.0 Hub" is what I consider a USB 3.2 Hub that does NOT have its own power supply module, and relies entirely on the host mobo port for power to be shared to all its connected devices. Your only concern at this point MIGHT be NOT to use them now and save them for POSSIBLE use in future. However, your mobo says it HAS two USB4 Type C sockets on its back panel. From your post, OP, you do not have any and do not need to worry about them. These use exclusively Type C connections and intend to achieve even faster max rates of data transfer, but there are not a lot of devices on the market for this yet. The latest developments in the USB field are the introduction of USB4 systems, now in two Versions. Gen2x2 can move data up to 20 Gb/s, but you MUST use Type C connectors to get that. SOMETIMES items like this may be called "USB 3.1". It should be fully able to get that max speed with Type C connectors. It can work with Type A connectors, but may NOT achieve that max speed this way. Often you will see items sold as "USB3" or "USB 3.0", and that normally means this Gen1 variant. Gen1 can move data up to 5 Gb/s, and works just fine with either Type A or newer Type C connectors. There are three speed ratings common now. That speed normally is actually much faster than the real performance of the device.
Right now, all these things are named as USB 3.2 Gen n devices, and the n part specifies the maximum speed the unit can communicate data. They have changed several times, and the result is that many descriptions you see are out of date and incomplete.
But first, an update on labels for USB3 devices.
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