My Mac Pro is having an issue where it will randomly restart. This typically occurs immediately after starting up and booting to the desktop. Usually the entire screen will freeze, and then the screen will turn black as the machine boots up. This can happen any time, but it seems to normally occur during startup. After it reboots, it tells me that the computer restarted because of a problem, and wants me to send a report to Apple. Each time this happens a kernel panic log is generated, though it never gives me the grey "You need to restart your computer." I have uploaded all of these from the past few days (as you can see, it happens often, usually in quick succession). However, all of the kernel panics are for different reasons and show different content, which makes me think that they either aren't very useful or they are caused by a hardware issue. One indicates "BSD process name corresponding to current thread: ReportPanic," which is amusing... I am thinking that it is a hardware issue, so I have tried the following: 1. Different video cards. I have tried using a Genuine 2600XT and an Windows NVS 450. The issue persists with both of them. 2. Swapping out memory/memory risers. The fault occurs regardless of the risers installed 3. Disconnecting peripherals. The issue persists I am currently thinking that it is a hard drive issue, as the drive in there is currently old and noisy. Does anyone have any other suggestions before I try a different drive? Thanks!