* Download and install nHancer (http://www.nhancer.com/) (a game profile manager that expands from the one in the drivers' control panel).
* Pick the Left 4 Dead profile and, in the compatibility tab check "CPU Multi Core support" then select single core.
* Below the games list mark the checkbox "Profile can be activated manually".
* Now you can enable multicore rendering in the game but every time you want to play L4D you have to activate the profile manually (from the tools menu or from the tray icon) and deactivate it after exiting the game.
* If you don't want to do that you can select single core in the global options and never bother enabling or disabling profiles, but driver multicore support will be disabled in other games you play.
Note for the skeptics: Doing this does give you a performance boost compared to having multicore rendering disabled, because the nHancer option only affects the drivers and not the game.
Also, incase you're wondering, the option "Threaded optimization" in the Nvidia control panel is not the same as the one I'm talking about in nHancer...
One more thing. There is a chance that this may fix the sould loop crashes affecting many people. Please try it and post your results.
I haven't tried this, but I did notice upgrading the drivers to the latest did mean game stuttering every minute or so for a few seconds. Maybe this will fix that? Anyone having this issue want to give it a try? Maybe this was the issue Assault was having after all these years (months).
Re: FIX the stuttering with multicore rendering enabled (Nvidia cards with newer driv
Right, this "FIX" is supposedly for people who want to gain the extra FPS by leaving Multi-core ON, instead of turning it off, but also not have any stuttering issues with it being on.
