I found this one while searching my registry. I'm not quite sure what it does, but I found out that that changing the number to a higher number help me to get to a place with my Ati 8500 where I have fast frame rates with no once in a while lag. You know, be playing a game and then it's like the graphics locked up for a second. This is where it is: Hkey_Local _machine\System\Controlset001\control\GraphicsDrivers. It says time out. I think it's a delay. Maybe someone can tell me what it is. I set mine to 11. Which seems to work well with my system and the tweaks I have done to the video card. My lower frame rates have come up. My top frame rates have become stable. Using 3d mark 2001 se. The graphics run smoother than before. Thought I would pass this on. Maybe help sombody who was having the same problem I was having which are now solved. Good luck!