I'm using windows 7 x64
I made a fresh install couple of days ago, and I'm experiencing this problem ever since.
I noticed the problem while I was playing a LAN game.
The game lagged alot, and was unplayable.
When I played the game offline it worked fine.
I went to Speedtest.net and had a ping of 500+ ms,
and when the download speed was tested it wasn't consistent, the speed changed every second (+-1 MBps every second).
I made another test using my iPhone after connecting to the same network via wi-fi. the ping showed 40ms and the download speed was consistent.
My drivers are up to date,
Maybe I'm missing something, but I couldn't find similar problem on the internet.
Hope to find my help here
Thanks for your time!
p.s I tried connecting via both wi-fi and direct Cable, same results