I'm living in Ho Chi Minh City
I guess you are using a Raptor, and you overclocked your CPU from 2000 Mhz to 3200 Mhz, wow
, you are a pro-overclocker.
I don't know much about RAID, so I can't help you so much
. Can you try to boot your FC5 with "acpi=off" to see what happen?
(I post instruction, in case you don't know hot to set it off)
1. Boot your system, at GRUB menu, point to your Fedora line, press E (Edit)
2. Select the 2nd line, press E again, add acpi=off at the end. Enter
3. Press B (Boot) to boot with ACPI off
Another way, I think, install GRUB again could fix this problem.