A very well written article on what LERP is: https://steamcommunity.com/sharedfiles/filedetails/?id=366151973 How do you check your LERP? Enable TF2 Console: https://steamcommunity.com/sharedfiles/filedetails/?id=217543736 Once you have enabled console open the console while in a TF2 server and type: Code: net_graph 1 If your LERP is 50+ you have a problem! To change your LERP, exit the server open console and type the following commands: Code: cl_interp 0 cl_interp_ratio 1 Reconnect to the server and see if your LERP has dropped drastically, and if you are still experiencing "lag". Disclaimer! These settings will not be saved when you exit TF2, to save them you must add the commands to your autoexec.cfg file in your tf/cfg folder. (You may have to create the file). This way the commands are executed whenever you launch TF2. Code: To create one, open up your file manager, and navigate to C:\Program Files (x86)\Steam\SteamApps\common\Team Fortress 2\tf\cfg Once there, select one of the .cfg files already present and copy it. Then paste it, renaming it to autoexec.cfg. After that, open it up in notepad and delete everything inside.