Well, with a 10/100 card at 100Mb/s, you're getting a full duplex connection. This means you really CAN transmit at 12Mb/s. a 10Mb/s card is half duplex, and you really get an average throghput of about 6Mb/s. Granted, you'll never see 100Mb/s. but in reality, about 2Mb/s is fine for most computer use, save big file transfers.
- G