Sounds like a shorted motherboard. You probably have a mounting post between the 3rd and 4th slot, with no hole in your board there. This is the most likely location because 1/2 of motherboards use a stud there, while the other 1/2 don't.
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You could also check that the heatsink is mounted correctly - if the CPU core is not contacting the HSF then after a very short time the CPU will overheat and the burnproof function on the board will shut off your PC instantly...
4.77MHz to 4.0GHz in 10 years. Imagine the space year 2020