To see if it's really a hardware issue, try a relatively minimal build. Format everything, then unplug everything except the bare necessities. No seconds CD-drives (no burners), no second hard drives, and no cards you can't live without. Then, try installing whatever you can in safe mode. If things go well, then 1) you have it installed, and 2) you can plug things in one by one to see if they cause a problem.