An external antenna will make a huge difference. Because the antenna is &#eh&0;b82ind2#8221; the PC, all of the fans, the power supply and even the case interfere with the 2.4GHz signal. Just get an external antenna and put it up and away from the PC (or even on top is fine) so that it has a line to the Linksys that doesn’t have anything that will interfere with the signal (TV, cable box, another PC, microwave, 2.4Ghz wireless phone, etc).