I have a Toshiba A300 with atheros AR5B81 -x mini pci wireless card two antennae I wnat to change to a 5.4Ghz min pci card what is the best one to go for Intel?
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Why do you want to change? If the current card does not support 5.4 Ghz then the antennas will not. Sure, you can plug it in and it will work, but the antennas will not work efficiently unless they are tuned for 5.4 Ghz.