Intermittent Streaming Issues With Tenda W522U

Hi. I recently “upgraded” my wifi adapter from a Panda PAU06 to a Tenda W522U in order to get 5 ghz support. I can connect on 5 ghz but I am getting intermittent stuttering and dropouts on internet streams (not on local streams shared over NFS so far). My power supply is a NorthPada 2A. Nothing else is connected to the Pi 2 other than HDMI and microSD. I’ve tried moving the Pi 2 right next to the router and that didn’t seem to make a difference. These issues do not occur on a wired connection. Is it likely that I need to get a powered USB hub? I thought perhaps it might be a driver issue or power management problem but have no idea how to troubleshoot that. Any other ideas?