I would try different ram first if you have any laying around or switch sticks / dimms and see if there is any change.
Do you have a different cpu you can try or try that cpu in a different computer?
See if you can get memtest to run. >>Memtest86<<
You already eliminated the psu as the problem by trying a known working psu correct?
then i got into the bios and then when i go to system information there is nothing
So it doesn't even tell you what cpu is installed?
I wouldn't suggest a bios update for an unstable machine as its a big risk so I would try the stuff above first.