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Passthrough 10GbE adapter

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I am trying to passthrough a 10 GbE network adapter to a Windows VM, but I have no luck. The motherboard is a supermicro C9X299-PG300F.



First I tried a ASUS XG-C100C adapter, but once inside windows it kept resetting itself all the time. Sometimes I could get it working, but then after reboot it was failed again. It just kept saying "unidentified network" and kept resetting. The event log talked about hardware failure.


Now I have changed out the adapter to a Supermicro Intel X550, and the failure is similar. I can sometimes get it working, but after a while windows disables the card due hardware failure. If I manually remove it in the device manager, I can get it working again, but it soon gets disabled again, and it does not last a reboot. I have tried different BIOS settings (per pcie slot) LEGACY, OFF and UEFI, and I have tried changing PCIE slot. Nothing seems to help. Now I am out of ideas...


Anyone got some idea?





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