Solutions
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Hamsterdan69's post in USB Trendnet 2.5G adapter was marked as the answerThanks all. I went back to a PCI-E adapter, runs fine (2.5Gb full duplex, transfers are around 250MB/s both ways), I'll try to use the NVME adapter in an old DELL Inspiron running as my test IPcop machine.
Thank you all...