My new-to-me 5,1 3.33GHz hex-core came with 32gb RAM and a Sapphire MaxEdition 7950. I cannot install an OS because the machine hangs on boot. The video card works fine on either of my other cMP 3,1 machines. I've done cmd-opt-r-p, pulled power to reset nvram and a few I've forgotten trying to get it up. Booting in verbose mode I see this 5,1 hangs while executing the second command, which deals with loading drivers. I've posted a screenie because I'm prone to typos and this is easier. I've scoured several forums without finding this problem, this forum crowd seems more savvy than most. Perhaps you can help me?