To get 450Mbps, you need 3 antennas, on both ends (computer and access point/router):Its not the router I have a MacBook Pro sitting next to the iMac. The MacBook pro was getting 450MBPS sitting right next to it. I though maybe some thing in the iMacs setting. or possible a dogey antenna inside do wifi cards slow down? or possible was there a cheaper option at purchase for a slower wifi card?