I have a D-Link DWA 130 wireless usb adapter when use the adapter i get between 6-10mbps but when i connect through ethernet my speeds are 30-35mbps. At first i had troubles with the dlink wireless manager so i uninstalled it keep the drivers and used the regular windows "connect to" function thingy. I have windows 7 pro 64bit. All my other computers reach the 30-35mbps speeds just this computer using the dlink adapter cant reach those speeds and i dont know why.