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For usb to ethernet I've used a Edimax usb3.0 usb-to-ethernet adapter. The 4k's played very smoothly.
Hi
I have now installed LE 7.0.3.0012 on eMMC and speedtest stills reports a download speed around 3.5Mb whereas for Armbian on a SD card it is 35Mb.
However I have also run a wget of 100Mb file from LE and Armbian and both report a download rate of 4Mb/s.
My box with LE only buffers occasionally so perhaps I shouldn't be worrying about speed testing.
Thanks for your help.