Hello,
I installed RouterOS 6.40.4 on x86 system with Intel GB Pro PCI card (82541PI). Everything seems to be working fine, but the strangest thing is that I can’t use Winbox if I connect through this card (the connection drops after 10 seconds max). SSH works fine. There is also an onboard RTL8102E adapter, and Winbox works flawlessly over it, so it is definitely a problem with Intel card. Is there anything I can try, or am I just out of luck?