D455 connecting as USB 2 - PCIE USB card recommendation?
I'm using several D455s attached to one computer. The camera attached to the USB3.0 port on the front of the computer uses USB3.0 if I use the short cable from Intel. Using a 2 meter or longer cable (Newnex or Anker) causes the camera use USB2. I wonder if there is something different about the USB3.0 port.
Can anyone recommend a USB PCIE card?
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Are you using a USB 3 cable when using your own choice of cable, please? If a USB 2 cable is unknowingly used then the camera connection would be in USB 2 mode. The USB 3 cables that Newnex recommend for RealSense are detailed in the link below. Is your Newnex cable one of those mentioned on this page?
https://www.newnex.com/realsense-3d-camera-connectivity.php
I do not have a recommendation of PCI-E card to make, though RealSense users reading this can certainly contribute their own advice.
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Not all USB ports are made equal even though USB is a standard. So a camera that works well on one computer might experience problems in the USB port of a different make / model of computer. Using your own choice of USB device such as a mains electricity powered USB hub or a PCI-E USB expansion device (as you suggested) may help to resolve this, as the camera would no longer be using the computer's built-in port and would make use of the device's own USB controllers.
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