I do not know if this is the place to ask this question but im gonna give it a go!
We have a very basic network setup at home but when i play games/skype aka use internet as streaming, im having massive lag spikes. The people i talk to cant understand me and gaming is also horrible.
Modem --> router --> router(without dhcp) (--> desktop (old setup)) LAG
modem(same as the other one) --> desktop NO LAG SO FAR
The downstairs router is a sitecom X6 N900 and the upstair router a N300.
More detail about the lag:
Whilst skyping people suddenly drop and come back after 2/3 sec this is the same in teamspeak. In gaming like counter strike global offensive im rubberbanding, teleporting etc.
I did a factory reset multiple times on both routers, i reset them by turning off power on all devices etc. And im at a loss. My dad thinks the internet is fine because he can open his emails but that is total different type of internet usage.
Directly connecting my pc to the modem seems to fix the problem but havent tested it properly yet.