The big one is the Bandwidth Limit - if that's set too low, changing the network hardware won't make any difference, because the card won't even try to use it.
Second is the Bandwith Maximum - if the 100MBit router is the bottleneck, and if it actually provides as much bandwidth as it's supposed to, this should get close to 100MBit.
(Note that the page shows the current session, so you have to put some load on it to get a meaningful number)