I'm currently using the ASUS wifi with my p5k deluxe board. It seemed to work very well with regular internet usage, and it added a lot of convenience because it saved my a pci port. I do not use this anymore though because I noticed while I was gaming online I would get lag spikes every now and then. I switched it out for my wmp54gs linksys card and these problems went away. If you won't be gaming online with this I would definitely use it, but if you are try it out and if you notice these problems -- it's the onboard wifi.