I've also got an 841n and if I enable wifi it causes interference with my TV and I can hear the power brick making a high pitch whine.
Turning the wifi transmit power down to 5 or just disabling wifi stops this.
I still have the problem with youtube videos, here is my setup i tried to make it as simple as possible, and testing with two games only (League of legends -> 5222/5223 and Tera Online -> 79.110.94.217 tcp).
But whenever i watch an hd youtube video my ping goes like 300-500ms...
Can you guys check my configuration and tell me whats wrong please :
Your post indicates you have continuous pings of 300-500ms (not intermittent high pings which are normal) but your posted download page shows filtered ping times of 65ms so I cannot see any evidence of a problem. It might be possible to make some observation if you would post a screen shot taken while the problem is actually occurring.
Also your screen shot does show an automatically determined ping target of 192.168.1.1. This is not likely a target that can work. What version of Gargoyle are you using? v1.6.1 includes an new and more advanced automatic ping target determination algorithm that will likely solve your problem.
I use latest version of gargoyle (1.6.1), also its continuous high ping whenever i put a youtube video in hd. Here is a screenshot : http://prntscr.com/3xptm6
Well i see it ingame where my ping spikes to 300-500 while a hd youtube video is just loading, or whenever someone is watching a stream it goes 250ms. I see it ingame all time.
And im not using wifi, ill try to get a good screenshot lol.
Also i dont understand but sometimes my link limit goes down to 1000kbps when im supposed to have 6500kbps...i dont get this have to restart router to get a decent ping.
ACC lowers your link limit to improve your ping to the ping target. The screen shot you showed indicates ACC was lowering the link limit to get your pings back under control. Given a few seconds it should have gotten it back under 100ms. Does it do this?
If you are having problems with the ping your game is reporting it might mean that your did not allocate enough bandwidth to your gaming class. Unfortunately you did not post your entire download page this time for some reason so I could not see if you gaming class was saturating or not.
How did you establish that your games needs 240kbps? Try raising it to 1Mbps and keeping a close eye on it. If your gaming traffic reaches this limit your gaming performance will suffer greatly.
Looks like you have selected a better ping target now to me so do not change that again.
If ACC lowered you link limit to 1Mbps it means your ISP really sucks and that is what was needed to maintain your ping. ACC will automatically raise the link limit when your ISP's performance improves.