Hi everyone, I'm hoping that, with all of your combined wisdom, you might be able to clue me in with some help. Last night, I sat down and upgraded my mom's desktop. The upgraded build includes: New Components Intel Core i3 3220 MSI B75A-G43 motherboard 16GB Kingston DDR3 Existing Components 180GB SSD w/ Windows 7 64bit (purchased within the past three months) Antec Neo 500W PSU (Probably about 5 years old) The Problem I assembled the system in a new case, and started the system up. Case fans start immediately, but the CPU fan sort of stutters for a moment, then runs quite loudly for about 3 seconds before the entire system shuts off and reboots. This cycle continues until you unplug the PSU. Steps I've taken I reseated the CPU I reseated the RAM, tried only a single DIMM, tried different slots I tried a different PSU, but received the same result * * This PSU, however, died last night as well, so I'm not too confident in its diagnostic integrity. Strange ... I pulled the Antec Neo 500W PSU and installed it in my dad's computer, and it's running fine. What should I do? I'm picking up a new power supply today to see whether this is the problem. I would love such a simple solution, but I'm not confident. What do you all think?