Hi IT gurus out there,

i need some help what to do with Unifi, my friend stays in 20+ floor.
While not surfing and ping -t 192.168.0.1 is really smooth and 1-20ms ping.

but when play dota, other online games the ping ms speed will fluctuate up and down. 100ms -3000ms +-
and no connection reply for few secs and resumed back, vice versa.

I 've done the port forward 6112-6119 but only port 6112 get activated when i test port open.
what is wrong ah?

pls advise 

1. Play games slow ? NO
2. Surf internet slow ? NO
3. Stream video/music slow ? NO
4. Router's location, which floor ? 1st floor of the three floors building
5. PC connected using cable or wireless ? pc with cable, laptop with wireless. both having issue
7. Is the Unifi installed with direct fiber cable into the house ? there is a white box at the ground floor of the building which i believe came from outside connection (fo). then from the box to 1st floor using fo cable (smaller white one)