I recently bought Mac Pro 3.33 with 2TB HDD. It was shipped to me on 23rd DEC but I haven't had time before to open it. Since the 2 weeks passed, Apple was not keen on replacing it completely, despite that I bought Apple care and explained the situation that I just opened it few days ago. Anyway, the problems that I am facing are as follows: - 2TB (Hitachi) disk is working like a tractor. Writing and reading sound is beyond normal and the head parks every few mins with very loud crackling sound. I have MBP, Mac Mini (I know 2.5" HDD) but also have HTPC running Win7 with external 1.5TB 3.5" which are silent. Let's say it is a minor problem though. The major one is that the system randomly hangs on the black screen just before showing the desktop. The problem is that I am not able to reproduce this issue, it just happens let's say 1 time out of 10 boots. Once it happen, I can put the MP in standby mode and then wake it up, so I can see the desktop but sometimes everything is clickable while the other time I can't click on any app, nothing - just the mouse works and I have to do force shutdown by pressing the power button. I tried some debugging, Apple hardware test passed, command+v showed different things when the problem occurred - once it showed "cluster err 14" but the other time it happened it showed something else, like "composite connection timeout". I have to add nothing except the monitor was connected to MP. I thought the problem might be related to the faulty disk, which certainly doesn't sound healthy. So I decided to install 120GB SSD from OWC and install the system from CD. Unfortunately it happened on the SSD too. I have to add that all updates were installed both in stock HDD and SSD. Did someone else experience something similar? Could it be that the video card is faulty?