I Have P7P55-m, Intel Core I7 870, Kingston Hyperx DDR3 2GB RAM, will add more later.
Ati radeon 5570 1 GB.
MAC OS X 10.6 Install dvd
Combo Update 10.6.5
and I have problem I do everything as you wrote, but sometimes it boots up, sometimes wont... i get errror
IOAPIC: Version 0x20 Vectors...