My beloved tank 2008 octacore has been randomly shutting down on me. It seems to be worse when I try to play a video or gently stress the system. No KP, just instantly goes black and dead. I blew out the system with compressed air, reset all the ram. Ram sticks all come up as OK in system info. It seems like this could be a failing PSU which seems to be a problem with the 2008? Does that seem right? Is this the correct item to buy? The part number is different than what I have found for my machine (661- 4677): Would this work fine? https://www.ebay.com/itm/Power-Supp...051042?hash=item3d319803a2:g:kVIAAOSw-xVZ6QNl Thanks!