I recently got a new computer and even with the antenna installed the connection is really inconsistent. At the highest it'll go up to 20mbps but that's rare and it'll often sit at around 5-10mbps, sometimes even dropping down to 1mbps or lower. This is strange to me as the WiFi on my phone and laptop will hold a steady 25-30+ mbps. I have tried reinstalling my network drivers and updating them, but they are currently on the latest version.