My PC has ports for 2 antenna, and if you removed one, the signal would drop by half - based upon where the router in my house is. That said, I only bought one of these, to replace my 2 broken ones, and it has 4/5 bars, which is very good. It also comes with its own REALTEK WiFi software, which I don't really use, I just needed the Antenna. The software does come loaded on a Mini CD. I'm able to play games without too much issue, minus my ISP.