Why is the speed of 10Gbit / s not rising?

Question

Network administration

Good afternoon. There are 2 PEB-10G / 57811-1S network cards, 2 Windows Server r2 and 2012 servers.
When measuring the speed, I don’t get a result.

Tested before on desktop machines, everything worked.
The only difference is that the cards cost 8x rather than the desktop 16x.

Answer 1

Either you have PCI-E v1 at the servers, or not 8x.