Hey Guys. I've got the mac pro Quad 2.8 + nVidia 8800GT. Here's my config: 4 Drives (Hitachi 1TB bay one, WD 500 bay two, WD 400 bay three, WD 320 Bay four). Stock 2GB Ram. I'd added 2 1GB sticks from Transintl, but took them out as the Mac would intermittently crash hard with the funky grey screen telling me I needed to restart my Mac. Thought it was bad Ram from Trans Intl... because I couldn't even get through a clean install of the OS with the Ram in there without the thing crashing. So, took out the third party ram, and re-formatted on the Hitachi 1TB drive ... and re-installed the OS Clean and all was well. Loaded XP for gaming via Bootcamp on one of the other drives, loaded VMWARE, WOW, and SIMS2. Haven't had ANY time to actually play for a long time (other than 30 seconds or so to test things out). ANYWAY... I go to work today, and my Fiance' is at the house playing the SIMS2 (in OSX)... Every 10 minutes of gaming time... the system crashes... not the app... the SYSTEM... and she has to shut down / restart. WHAT THE HECK IS GOING ON? I've only done the following: Clean install iLife '08 iWork VMWARE (no actual virtual machines yet) Copied over itunes / iphoto files from backup Installed WOW Installed Sims 2 Installed Sims 2 Pets Applied all updates Installed XBENCH, ONYX, and VLC. THATS IT. Where should I check???? What do you think the heck is going on????? (P.S. The game resolution is 1680x1050 with most settings on medium).