Summary: Just a super easy install. Added these 4 interfaces to the 2 existing onboard NICs for a total of 6Gibps bonded interface on my FreeNAS. Did not seem to be (trivially) recognized by Windows 7 (tried it briefly before installing into the FreeNAS box) but that's not an issue for me. If it is for you, do some more investigating first. It runs a little warm, but not super hot.