L4d lag fixes - especially Nvidia driver 180.xxx users!

[Tricky]

Check out this link for L4D lag/performance fixes. The Nvidia driver issue is particularly key if you're an Nvidia user. I was suffering from a big lag problem with the latest drivers until I went back to the 178 drivers as they suggested.

http://left4deadforums.com/1873-lag-sound-loop-crashes.html

Getting Low Ping Servers

Also, the tip for forcing L4D to only connect to low ping servers is particularly useful too. I used sv_search_max_ping which worked great.

Lag:
*Note This can't always be fixed due to location, and ISP

At the main menu hit your console key (Defualt ~) Then in the console type in "openserverbrowser" (without the "s) and hit enter go to the custom tab and re-fresh all and join a server that pings less than 100 to you. 

At the main menu hit your console key (Defualt ~) Then in the console type in sv_search_max_ping 100 (default is 250) Should make Launching games from the Lobby a bit less painful.