I'm not sure what the difference is between the i-225LM and the i-225v NICs but I've been running two i-225v NICs for over a year now without any issues at all.I swapped them out from a couple of 82576 cards. They showed up when I booted it back up, and all that I had to do is assign the interfaces. The speed/duplex is set to default, and they always show "2500Base-T <full-duplex>".I have 1200/40 service through Comcast, and it always tests at ~1100-~1300. They have been rock solid.I hope this helps.
@CJRossYes. They're PCIe cards.