Computer randomly shuts off, regardless of what I am doing

[Koby__]

Hello all,
So I have been having this problem for about a week now and it is quite frustrating. My computer has been randomly shutting off completely without any warning or notice. I say randomly because it could happen after my computer being on for 10-20 minutes or it could not happen at all after being on for a day+. I have been troubleshooting for awhile now and I have no idea what it could be. We have put in a new PSU, switched out the ram, switched everything into a new case with better cooling, and have even switched the CPU to water cooling.
At this point I don't think it is a hardware issue only because of how random it seems. I am not a huge wiz when it comes to computer tech so I could be wrong and missing something here, but a few days ago I was able to play games, and watch streams/youtube videos on my second monitor from about 12 PM until 2 am the next day. Then when playing the next day it shut off randomly again after 10 minutes, and ever since then it has done the same.
If I can provide any other information please let me know.

Specs:
Z97-A asus motherboard
Nvidia geforce 980 GPU
750 W EVGA supernova PSU
2 8gb Vengeance Ram sticks
Intel I7 processor
Windows 10

 

[badboyrog2]

your psu is G1 or G2 series ?

all updates from windows are installed ?

your water cooling stuff work well?

 

[jkhoward]

What are your temps? Sounds like something is overheating..

 

[Koby__]

Have not used this site so i am unsure how to respond to you all who replied so I will just answer here. PSU is brand new gold+ rating I am unsure of G1 or G2 but what ever the better is, is what I have. Windows updates are installed, and the water cooling stuff is working perfect. Temps are normal if anything a little cooler than the average. Because of the randomness of the shut offs it is hard to keep track of the temps at all times, but the other day it turned off about 25 minutes after start off and all the temps including CPU and GPU were cool and good, and the voltage from the power supply seemed normal at all. I thought it might be the outlet im the room i am currently in but I can use a friends PC with the same power cord plugged into the same surge protector that my computer normally goes in to.