Apex_AU

Mate, living in Australia sure makes it hard to be a bleeding edge tech enthusiast. The price for anything PC related gets jacked up beyond belief. It's even worse for obscure items like watercooling gear. I shed a tear (and add 100%) everytme I see the US launch price for an awesome new tech product. I had to import my Shield tablet from the US and pay an outrageous amount for shipping because it hasn't even been released in Australia. Just one of many... /rant

I had this problem and it took me ages to figure out. I ended up being caused by a sleeved 24 pin motherboard extension cable that had slightly damaged pins at the point of connection to the board. I bought a new power supply which didn't fix the problem because I kept the extension cable. I didn't discover the faulty cable until I replaced it after buying a new sleeved extension kit. The most likely cause of your shutdowns is a faulty power supply but I'd recommend checking that the cables are property connected to your hardware and to the power supply itself (if it's modular) before replacing it.