I have a Dell M6700 Precision laptop that can only connect at 100MB to an ethernet network, even though it has a gigabit ethernet card. I've checked my network cables, and can plug another laptop in and it connects at 1gigabit. I've tried reinstalling the drivers from the Dell.com/support web page. I've udated the bios. I've checked that the network driver is on autonegotiate. I've unchecked the "save power by slowing down the connection" option.