Hi. Have been running a 20" 2.0 Ghz intel core duo with my netgear wireless router/modem for a couple of months at speeds I've been more than happy with. Upgraded today to a core 2 duo 24" and have it set up running fine apart from the built in airport. The signal meter is only showing half strength and the transfer speeds are pathetic. Bear in mind the two mac's are sitting next to each other on the same desk. The older one runs well, the new one runs like a dog with three legs. Any fixes for this?