N450 Ping Spikes, wired and wireless, online gaming impossible

I found this older thread and his solution worked, turning off plex.  But, I am not happy with that and I know the problem is with my N450 hardware and not the fault of plex.  I used to have a separate mortorola surfboard modem and linksys router and did not have this problem.  Those are the only things in my setup I changed.  Changed them to the N450 and now I cannot game online(on any platform, PC, Xbox, PS4, all get ping spikes) while plex server is running on my PC.  Is there anything in my N450 settings that I could do to possibly fix this?  I didn't have to open any ports for plex or anything like that with my old networking hardware but maybe the N450 needs something like that?  I have tried disabling DLNA on my plex server but the issue persists even with that turned off.  IDK.  I would like to be able to keep my media server running and game online, if that is beyond the capability of this N450 I am severely disappointed in my choice to swtich to Netgear hardware.  Any help or responses will be appreciated.  Thanks all.

TL;DR: When plex media server is running and I ping the N450, it consistently gets ping spikes anywhere from 300-2000ms pretty consistenly every 15 seconds or so, making online gaming on any of my platforms, wired and wireless, impossible.  This did not happen with my old networking hardware, a separate modem and router.  Nothing else has changed in my setup.