plugged into a hp procurve 2920 and RK375 (broadcom 57710) using 10gbase-T over 50ft of cat6 monoprice crappy cable.
take a second and inspect your card, out of 4 cards, i found physical damage to 3 with a 16x magnifying glass and rma'd them. They would not link up nor flas h but appeared to pass self-tests.
With any used gear, you should do a physical inspection as some people knock caps off or blow them up it seems. Probably some dumbass plugging a phone line into a 10gbe ethernet nic and frying the TX'er
take a second and inspect your card, out of 4 cards, i found physical damage to 3 with a 16x magnifying glass and rma'd them. They would not link up nor flas h but appeared to pass self-tests.
With any used gear, you should do a physical inspection as some people knock caps off or blow them up it seems. Probably some dumbass plugging a phone line into a 10gbe ethernet nic and frying the TX'er