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USB3 on a USB2 motherboard

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USB3 on a USB2 motherboard

Postby OneWorld » Thu Oct 24, 2019 11:42 am

If someone has a motherboard that only supports USB2, and that includes the headers on the motherboard, would adding a PCIe USB3 card add USB3 capability or is it the busses on the motherboard that would prohibit USB3 capability?
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Re: USB3 on a USB2 motherboard

Postby Hugh Robjohns » Thu Oct 24, 2019 12:16 pm

No, the PCIe card's electronics should provide the same interfacing to the internal busses that a native USB3 chipset would do. That's the whole point of it, surely?

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Re: USB3 on a USB2 motherboard

Postby Jumpeyspyder » Thu Oct 24, 2019 12:35 pm

If you are adding a USB3 PCIe card:-

Existing USB2 would still only operate to a maximum of speed of usb2 (they are limited by the existing motherboard hardware)

New PCIe card ports would be USB3
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Re: USB3 on a USB2 motherboard

Postby OneWorld » Thu Oct 24, 2019 5:43 pm

Jumpeyspyder wrote:If you are adding a USB3 PCIe card:-

Existing USB2 would still only operate to a maximum of speed of usb2 (they are limited by the existing motherboard hardware)

New PCIe card ports would be USB3

Thanks
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