recently I read about a linux kernel patch called TNAPI that improves packet capturing (http://www.ntop.org/TNAPI.html). In order for the patch to work one of the following NICs is required
1 Gbit: Intel 82575/82576 (Linux driver igb 1.3.x)
10 Gbit: Intel 82598/82599 (Linux driver ixgbe 2.0.x)
For some reason I could not find an intel page that lists all network adapter cards which feature a 82575/82576 chip for example. Even the network adapter card datasheets do not seem to give any information about the chip used. Would be happy if someone pointed me in the right direction.