That sounds somewhat like Window's bluescreen which generates numerical strings, and guys like you who are driven to know, can use the string to find a fix. I've always wondered why computer makers couldn't make the machines self repairing. Apple does seem to repair or at least stop larger problems. I plan to familarize myself more in the future. I use the Mac Pro to process video that I take of my wifes yoga, which we sell through an Ashram (Indian Studies of Excellence), but I use another drive (2TB) that has Windows. I've used Windows since 95' and know it well enough that I've never had a computer I couldn't restart in safe mode. Windows gives more access to the computer, and I'm not sure that's a good feature for most people, it allows you to make some fatal errors, but it has Device Manager that shows defective or misconfigured devices. I have a firewire attached soundcard attached, its a Focusrite Saffire Pro 40. I use Cakewalk Sonar studio to record soundtracks, and Pinnacle studio for video. Mac has never given me any trouble and its a workhorse. What motivated you to buy Mac Pro? Are you a gamer? Do you work for Apple? You sure have a vast knowledge of the product, and I'm so lucky and proud to have come here to meet up with an advisor such as yourself. I again have to thank you.