Ping spikes on one PC but not the other

BobJimbo

Commendable
Nov 22, 2016
1
0
1,510
I recently bought a new PC to replace my ageing laptop that I hoped I would be able to play graphically not-terrible video games on and the like, but whereas on my laptop the internet connection was nice and smooth, on my new custom desktop I have a consistently good download speed like before, but while playing I get often and severe, though irregular, ping spikes. Really could use some help as I'm stumped! (not that I'm well trained in internet troubleshooting)

I'm on private residences internet so no router specs and no ethernet - I'm stuck with WiFi.
Here are my specs:
Motherboard: MSI Z170 A Pro LGA1151
PSU: EVGA 600W
WiFi adaptor: TP-LINK TL-WN881ND
OS: Windows 10 Pro

ISP is Keysurf or Keycom (one or the other). I've currently got my PC and my phone connected to the WiFi but the lag spikes remain when I disconnect my phone. No error messages obviously, since I'm technically connected and with reasonable speeds.

Also, I checked to see if it was specific to the game, but I also get the issue while using Discord.