Hello All, I have a 1,1 Mac pro on El Cap. It is on firmware 2,1 with 4 GB of Ram (Soon to be updated), dual core Xeon 2.66 cpu's, and a 8800 GTX from an old Gateway. I have it setup with Pikers boot efi file. It gets to the desktop no problem and appears to work, but anywhere between 2-10 minutes of use the computer will freeze and just reboot. Also due to the PC based gpu I can't see the boot-up process at all. Any ideas on the issue or how I can fix this.