Not just that.... When you start up CSS type in rate 20000 , cl_cmdrate 66 and cl_updaterate 66 into console. Basically it's how often your pc asks the server for information, having these too low means that you lag around and may be classed as cheating. Some people think that they got the default rates that came with the game, they are fools as on some servers before a little update by steam there were plugins which would change peoples rates so that it would work with the server... sometimes if you joined a server far from your country it would lower your rates. Alas these plugins to change rates cannot be used due to cl_restrict_server_commands.