tried changing jumpers on the motherboard (GIGABYTE "GA-7VT600 1394") and well, the first time it said it was 600something Mhz so then I turned it off right away, tried the jumpers oposite and then it showed 1.6GHz (which is what it is) but didn't boot so I turned off and set the jumpers back to auto and tried booting, still no boot. Doesn't let me enter setup and it doesn't boot..