Link state UP/DOWN - HELP PLEASE !!!

[greenboxpl]

Hi,
from several days i have problem with configuring pfsense 2.0.1 with 2 WAN and 2 LAN. The problem i think is with pfsense itself or with hardware.
After configuration everything works for 1 to 2 hours, and after that time pfsense hangs or reboots. I have noticed that before hangs on console shows something like that
"rl1: Unable to stop Rx/Tx MAC, rl1:Reset never completed". In logs i have rl1: linkstate changed UP/DOWN every second, and nothing more.
It seems to be a problem always with same interface, because earlier i have same problem with another nic (3nd form 4 installed, 1 embed and 3 on PCI).
And this interfaces works perfectly in another pfsense box with only 3 nic's.

Now i have no idea what could be worng, motherboard, RAM, pfsense. I thing the nic's are okey because they works in another configuration.

Please help  ???

[podilarius]

just my $0.02, it seems like a MB issue to me. realtec is some subpar nics imo. I have been burned by alot by the cheaper realtecs and some by the higher end.