I have problem with my new Archer T600U Plus.
It's used on desktop pc with Windows 10 and let's say every 2-3 minutes i have 3000+ ping when I test the internet ping through command line.
The wifi network that is used is on 2.4 ghz, on the other devices (laptops, phones) i don't have problem, it's only with the adapter.
I tried to max power wifi adatper settings in the power options and disabling usb selective suspend option, but still have this issue on my pc.
Please take a look at the screenshot... I need help, it's so annoying.