Soleron on 27 July 2013
I have this exact problem, and, having looked itnto it, sorry it's unfixable. It happens when both me and my brother do something on the same connection, like playing a game and watching a video. Both of our pings spike to like 300ms from 30ms which make games unplayable.
Connections from two sources can cause a problem in the "network buffer" on the ISP end if it's too small, and it's not a value you can persuade them to change (let alone get across to a level 1 tech support person). It's nothing to do with the connection speed.
Run this while watching a video:
http://netalyzr.icsi.berkeley.edu/
and tell me what flags up.
