Hi there,
my GA-P35-DS3 died, so I needed a new machine. Using this guide, my new GA-X58A-OC works perfectly. Lion boots without a problem every time, but Mountain Lion troubles me. Sometimes it boots, but most of the time in the Chameleon screen, the message "can't find /mach_kernel" appears. Actually, I have no clue why this happens, and I have no reliable solution to boot into ML. Has anyone else seen this problem?