can you help me out in a quick test with BC2. I have a idea what it is maybe but need some help. Can you uninstall the realtek drivers of your lan. Clean it out completely. any realtek drivers you have on your pc get rid of it then check how it performs. I notice a couple of users having the same issues with the quads all got realtek lan that they were using. Check the game performance offline with the drivers then without the drivers.