Computer randomly shuts off

[Doge Verm]

This problem has been happening over a week now.
When I try to run the simplest of games such as Medieval 2 Total War or Lord of the Rings Online, It seems like the PC can't handle it and just shuts off without a reason.
When I checked the temps before shutdown, both the CPU and GPU were somewhere between 40-50 degrees and RAM usage between 4-5GB.
I literally have no idea how I can fix this, It was gone for a few days after messing with audio drivers but just came back without a reason. I suspected it might be my PSU or a lose cable or even temperature problem but I have no way of really identifying this problem.
Can anyone help me with this?
Tomorrow after I get home, I'll take a look inside the case for any loose cables and if its not the cable problem, I'll clean the whole case.
Specs below

CPU- Intel Core i7-4770k
GPU- GTX 770
RAM- 16GB Overclockers UK (already checked if RAM problem and both sticks work)
MOBO- G1 Sniper 5
PSU - Strike-X 800W

 

[Gregsvn]

That's a really low quality PSU i wouldn't be surprised if that's the problem.

 

[ModernWarfare]

i suspect a psu problem here.

 

[ModernWarfare]

replace the psu with a more solid brand like Corsair,Seasonic,EVGA,XFX,

 

[Doge Verm]

replace the psu with a more solid brand like Corsair,Seasonic,EVGA,XFX,

Which PSU would you recommend for me to get for my current specs and later maybe dual/triple monitors and a GTX 970?

 

[ModernWarfare]

what website do you prefer your purchase?

 

[Doge Verm]

what website do you prefer your purchase?

Probably amazon but it can be anything that ships to UK or around UK.

 

[Doge Verm]

Also before I get a new PSU, is there any possibility its something to do with the temps or outdated drivers or having unnecessary drivers conflicting with other ones? I can screenshot my drivers list if that would help.

 

[ModernWarfare]

i highly recommend this psu as long as you're gonna be doing things in the future also.

http://www.amazon.co.uk/EVGA-Supernova-Modular-Power-Supply/dp/B00LMAUVH4/ref=sr_1_3?ie=UTF8&qid=1453761500&sr=8-3&keywords=evga+750w

 

[ModernWarfare]

your temps seem fine. something like 85-90c would be dangerous but that still wouldn't cause the pc to immediately shut off.

 

[Doge Verm]

your temps seem fine. something like 85-90c would be dangerous but that still wouldn't cause the pc to immediately shut off.

What about outdated drivers or conflicting drivers? I'll check PSU cables tomorrow, clean the PC on Wednesday and also if you know anything about conflicting drivers, here's a screenshot of mine.
(Had to split into multiple screenshots)
http://prntscr.com/9utyw0
http://prntscr.com/9utz2b
http://prntscr.com/9utz7j
http://prntscr.com/9utzds
http://prntscr.com/9utzka

 

[ModernWarfare]

Drivers will not cause a pc to randomly turn off. it would BSOD or freeze. you can also try updating bios if thats an option but other than that it may be the psu's problem.

 

[Doge Verm]

Drivers will not cause a pc to randomly turn off. it would BSOD or freeze. you can also try updating bios if thats an option but other than that it may be the psu's problem.

Where can I get newest drivers for my BIOS?

 

[ModernWarfare]

from here, F10 is the latest.

http://www.gigabyte.com/products/product-page.aspx?pid=4487#bios

 

[Doge Verm]

from here, F10 is the latest.

http://www.gigabyte.com/products/product-page.aspx?pid=4487#bios

Hey, I tried running the F10 but it came up with a error message after extracting and running the .exe file
(I have Windows 7 Home Premium 64 bit)

 

[ModernWarfare]

add the zip file to a flash drive format FAT32. then go into bios and run q-flash then select the flash drive and then select the file.

 

[Doge Verm]

add the zip file to a flash drive format FAT32. then go into bios and run q-flash then select the flash drive and then select the file.

Hey, just thought I should tell you. I tried running Lord of the Rings Online which is a very old game and shouldn't be demanding on my GPU and CPU. I had about 3 mins before the PC shutdown. I had MSI Afterburner running and the last temps I saw before the PC shutdown was 58 degrees on GPU and 40 degrees on CPU.

 

[ModernWarfare]

that temp is normal.