Hey all, I am running an early 2008 Mac Pro: 4GB ram (only 3 running in XP) Dual Intel Quad-Core Xeon 2.8 GHz ATI Radeon HD 2600 256MB So over the last couple months, I've been getting some extremely bad and annoying freezing problems when playing Left 4 Dead on 32bit Windows XP Home Edition. The last sound played repeats over and over again with the screen freezing; this has lasted anywhere from 5 seconds - 40 seconds. My frame rate doesn't seem to be making a huge difference, its consistent at 45-60 fps when its on pretty simple settings: Anti-Aliasing: None Ansiotropic Filtering: Trilinear Vertical Sync: Disabled Multi-Core Rendering: Enabled Resolution 1650x1050 Shader Detail: Medium Effect Detail: High Model/Texture Detail: Medium Paged Pool Memory: High At first I thought it might be my Graphics card over heating but tonight I tried it with the case open and a very powerful fan blowing air directly onto the card and the problem continued. If anyone has any ideas please, please help me out! I hate to think that I can't play this game when this computer has such good hardware. PS. this hasn't happened with any other games but it doesn't run Crysis very well but thats obvious because well...its Crysis and even with it I have higher settings on. I've also cleared the computer of any spec of dust, just so you know. THANKS!