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No spare available, unfortunately. The weird thing is that the card is obviously working, just somewhat slower than I would expect. I was hoping someone might know whether a NIC with a non-functioning CPU could still work but slower than normal.
– boot13
Commented Oct 22, 2010 at 11:09
Does the NIC support protocol offloading (en.wikipedia.org/wiki/TCP_Offload_Engine) perhaps that function is failing in some interesting way. See if the NIC has any such fancy features and turn off all that you can so it is working in as basic a mode as possible. If that helps, turn things back on one-by-one and see when the problems start.
– David Spillett
Commented Oct 22, 2010 at 16:55
I tried disabling all the offloading features as you suggested, but it didn't seem to make any difference. Eventually the problem just sort of went away (see update above). Anyway, I'm going to accept your answer since it was helpful.
– boot13
Commented Apr 15, 2011 at 18:10

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