My S/O and I are currently using a 2-port powerline adapter, and we get speeds around 30up/30down with ~12 ping. It seems that our setup works completely fine except in the situation where someone is watching YouTube while the other is gaming.

Things that didn't cause lag spikes:

  • Playing CS:GO at the same time
  • 1 person playing CS:GO, the other watching Twitch in "Source" quality
  • Both watching YouTube videos at the same time
  • Both watching Twitch streams at the same time

Things that did:

  • 1 person playing CS:GO, the other watching YouTube in any quality (tested in 1080p, 720, 360)

Does anyone know why this happens? It seems pretty bizarre to us. Thanks!

  • Which game are you playing? What quality of video are you watching from Youtube? That's going to be important information. – Frank Sep 2 '15 at 0:48
  • We are playing Counter-Strike: Global Offensive, and the lag occurs with YouTube videos of all qualities. – sheesh Sep 2 '15 at 0:50
  • Only that game lags? Do any others? – Frank Sep 2 '15 at 0:52
  • Haven't tried any other games, but we can try and see what happens! – sheesh Sep 2 '15 at 0:52
  • Playing League of Legends with the other person watching a Twitch stream caused it the in-game ping to go from 60ms to ~80ms. YouTube doesn't cause any noticeable ping increases, but the videos buffer very slowly. I'm thinking this might be a Quality of Service problem but my router doesn't support QoS settings. :( – sheesh Sep 2 '15 at 1:05

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