Papaki - very strong advice. That seems to have done it. I will add that I had a very long - and incredibly helpful - conversation with the folks at OCZ when I first got my new ASUS p5e3 b/c it wouldn't startup/post, and he said the fast (1800) ddr3 I optimistically bought was essentially TOO fast. He went on to add that none of the mobos out yet can do justice to fast rarm with quadcore cpus. I have solved my problem by DOWNCLOCKING my ram to 1200...sort of a bummer. It FELT like a ram problem...I actually got not one but 2 bad ram sticks from OCZ, but they were great about replacing (lifetime warranty) and also hooked me up with a great routine for ruling out RAM as a source of problems: MEMTEST (you burn it to a cd, then you just reboot and it hums along checking every nook & cranny of your ram). Anyway, the RAM was coming up good, but the hanging behavior was so random. Thanks again for the suggestion. I was truly stuck.