I've been using a unit I received from work a year ago that's always had random boot issues. Occasionally when I turn it off or restart for an update, it will power down and when it's supposed to reboot/I turn it back on you hear power go to the CPU and and low power to the fan on the video card. No hard drive, cooling fan, keyboard or other usb outs are getting power during this time. I've tried unplugging both hard drives, the sound card, all usb/ethernet devices, basically everything except the video card to determine if it's an issue of a lack of power (I'm using a 600Watt Power supply and a Nvidia Geforcee FX 7800GTX card by the way) and it still won't generate enough power to even load an image on the screen. This has been happening ever since I rebuilt the computer for my personal use. Do you guys believe it's a motherboard issue or am I overlooking something? I just realized I haven't tested the memory yet so I'll go do that after I submit this post; though I don't think that's it. Edit: Yup, not the memory.