USB 3.0 Hub (I need some explanation)

[TheNaitsyrk]

Okay,

 

My board doesn't have enough USB 3.0 ports.

So I'm planning to add PCI adding card to get more.

But not sure if that's a good idea.

 

What if I added USB C USB hub?

 

Does the bandwidth gets split? Or if I plug it into USB C at the back all the USB 3.0 ports on it will work full speed of 3.0?

 

I'm asking because I need to plug in some devices that specifically require USB 3.0 speeds. 

 

I know it could be a dumb question.

 

If the bandwidth is not split, and they all work full speed it will save me from wasting £100.

[TheKDub]

If you plug a hub into a USB 3.0 port (640MB/s), the connected devices have a maximum of 640MB/s available.

 

So if you had an SSD connected to it and were copying files from it around 400MB/s, the rest of the devices only have about 240MB/s to use until the SSD is done.

 

You can connect USB 2.0 devices to USB 3.0 ports, and USB 3.0 devices to USB 2.0 ports. (However I wouldn't recommend it unless speeds aren't a concern, as USB 2.0 is quite a bit slower)

[emosun]

more than likely all your devices do not need usb3 speeds at all times

[Turtle Rig]

9 minutes ago, TheNaitsyrk said:

Okay,

 

My board doesn't have enough USB 3.0 ports.

So I'm planning to add PCI adding card to get more.

But not sure if that's a good idea.

 

What if I added USB C USB hub?

 

Does the bandwidth gets split? Or if I plug it into USB C at the back all the USB 3.0 ports on it will work full speed of 3.0?

 

I'm asking because I need to plug in some devices that specifically require USB 3.0 speeds. 

 

I know it could be a dumb question.

 

If the bandwidth is not split, and they all work full speed it will save me from wasting £100.

You can get away with a non powered hub by getting one that has a USB to extend. and plug that into a usb 3.0 port on your motherboard.  I guarantee you this will work proper.

[mariushm]

First of all, what motherboard do you have?

Do you have USB 3.0 and USB 2.0 headers on the motherboard? Most motherboards have extra headers.

If so, you could buy USB 2.0 or USB 3.0 brackets and attach those brackets in the back of your PC and move your low bandwidth devices to those USB 2.0 ports (keyboard, mouse, maybe usb speakers etc)

 

What device are you trying to connect to usb 3 ports?

 

A USB Type C hub is still a USB hub, Type C connectors are not something magical, they're just designed to allow you to insert the cable whichever way you like.

 

If a USB hub is plugged in a USB 3.0 port, the hub will get 5 gbps.  The devices plugged in the USB hub get bandwidth out of that amount, as they need.

The amount of bandwidth each device will use will depend on the device, what data packets they send through the USB cable and other factors.

You can expect approx. 4.5 gbps of bandwidth from a USB hub, merging the data from multiple usb ports is not free.

 

If you buy a USB 3 controller, the maximum speed you're gonna get will depend on the slot you're gonna plug the card in.

USB 3.1 gen 1 ( 5gbps) has in theory a peak of around 550-600 MB/s.

A typical USB 3.0 / USB 3.1 gen 1 card with two USB ports will be connected to a pci-e x1 slot, so you'll have either 500 MB/s or ~970 MB/s of maximum bandwidth (pci-e 2.0 vs pci-e 3.0). That's the maximum theoretical speed of pci-e x1, in reality due to overhead and arranging data in packets and all that, expect at most something like 480 MB/s or 950 MB/s respectively.

 

If you need throughput for a usb capture card for example that sends raw footage over usb, best to keep it on the usb ports created by the chipset, so that it will go direct usb -> chipset -> sata / nvme and move other stuff to a separate usb controller card.

 

 

 

[TheNaitsyrk]

2 minutes ago, mariushm said:

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I need it for VR, and all other USB devices.

[mariushm]

Well thank you for the detailed answers to my questions, makes me really want to continue helping you out.

If you're too lazy to answer why should i bother...