@keyser said in vmxnet 3 only autoselect available - limited to 1.4GiB/s (10G not working):
If you choose the Intel 1000 adapter i ESXi, it will also show 1000Base-T as a connect option - because the adapter emulates physical hardware.
That's what I would expect. That's what hardware emulation should do.
VMXnet3 is a paravirtual adapter that does not emulate specific physical hardware, but is software only - and software speed limited only.
virtIO is paravirtualized as well. That is all, what I was saying. Above you mentioned paravirtualization as the only reason for not showing any connection speed. But this seems not to be the whole story.
Obviously virtIO signals the operating system that it is a 10Gb hardware, but vmxnet3 does not.