I am just about to purchase a new laptop and plan to get wireless n built in card - probably a Intel WiFi Link 5100 a/g/n. - here is a very basic question - will these cards work for both 5 ghz and 2.4 ghz bandwidths? Is that part of draft 2.0 n? Tim mentions in his reviews to make sure you have the same chipset in your notebook wireless as in your router...