When gaming I get very high latency and disconnects. If I ping the router during play I get a high response time (30-150ms) as well as periods of 3-10 timeouts in a row. On rare occasions I am able to play without any problems but I have yet to determine any pattern. Most of the time all other internet activities are fine, web browsing, downloading etc. But a few times a day I will temporarily lose internet access (yellow triangle over wireless icon) for about a minute. Other times the yellow triangle will not be there but I will be unable to access any webpages, they just hang, restarting my PC is the only way to fix this.

edit: Programs like steam and mumble will drop connection and reconnect about once every 30 minutes or so.

I have replaced the router and my wireless card. I have reinstalled windows. The problem only started after living here for quite a while, so it is not related to the house as far as I can tell.

I have yet to try with a wired connection as the layout of the flat makes it a bit impractical.

My Specs:
Windows 7
Gigabyte GA-H77M-D3H LGA 1155 Rev 1.0
Intel i3-2120 3.3Ghz
AMD Radeon HD6670
8GB DDR3-1333 RAM
TL-WN881ND Wireless Card
TD-W8960N Modem/Router

My ISP is Telecom.

Any suggestions or advice would be appreciated.

Thank you in advance.