Unless the CPU shop physically placed the hardware they said was bad into another working PC one at a time to test, they wasted your time.
What instantly comes to mind for me is that Corsair CX. I've had that very same PSU crap out on me within weeks IN THE SAME WAY, luckily without a bang and a voltage spike. It could also be the VRM as posted above. any chance you can get pictures of the VRM area on your motherboard or inspect if for blown/scorched mosfets or caps? (a dead VRM doesn't usually burn, but in my experience if you lost your CPU, I would expect a cooked VRM/Socket) This is very likely either PSU or VRM the way it started with errors and quickly ended with no post, I'm assuming the fans still crank when you power it up right? I would seriously see about borrowing a good PSU and seeing if it springs right back to life. Take out your 980 Ti
while you're working on this and just use the integrated 1) to rule out the GPU and 2) to keep that very expensive piece of hardware out of the way while you're working. Strip it down to 1 stick of ram and just your boot hard drive, disconnect all peripherals except mouse and keyboard.
In order to narrow it down to the culprit, you need to be able to test individually each piece of hardware in either a separate machine or stripping your pc down barebones enough to get it to post (which still wont happen with a bad board or PSU). On the flipside you can test good ram/cpu/gpu on this pc but I wouldn't until I was sure I was using a good PSU. I'm guessing your friendly PC shop didn't do this for you.
I highly doubt 3 days of life with a modest OC killed your CPU. I would start by returning the PSU and upgrading to something better, you'll want it anyway with a setup like this. If that doesn't cut it, swap the board.
Originally Posted by CDub07
Cany you really kill a CPU nowadays? Most mobo have thermal protection and other things to prevent damage. Unless you put some insane Vs through it.
Yes you can, at least I have, but I haven't seen this happen without excessive overclocking and/or a visibly scorched vrm and/or socket. Bad psus and vrms can take hardware still.Edited by Serious_Don - 1/25/16 at 3:09pm