I'm sorry to tell you that I am in the same case ... I did what I said above and in the end I have formula XII using marvel 10gb with the 2.1.21.0 driver and the firmware version 4.2.29.
Now I have no way of updating or restoring the firmware to any other version because whatever I do it always shows 0.0.0.0 .... I already give up installing any other version, I consider it lost.
I keep having packet losses, and random network disconnections for no apparent reason, I lose the DCPH when I want and I have to be giving it to (solve problem) in windows to reconnect ... it is infinitely annoying because when it catches you playing you You stay in the middle of the game or you fall directly.
It is the worst RED card I have ever seen on a motherboard! I am willing to get rid of it and the worst there is no solution ...
thanks! jordi barcelona