PC shuts down only while playing DAI

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@Noiko-san wrote:

No overheating and no voltage issues after checking on my BIOS.

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What exactly are your CPU temperatures while playing this particular scene?

As far as I'm aware, there are two possible causes for a PC shutting down while playing: Overheating hardware or a bad power supply.

The CPU temperature was at 50º/51º. This shut down already happened at least 3 more times during scenes like this. 

Get a replacement Power Supply, and make sure it is a high quality product, from a manufacturer with a spotless reputation. 

http://www.newegg.com/Product/Product.aspx?Item=N82E16817194111

I just got this Power Supply 3 months ago. Before I got it I made sure it was enought to support my PC. And honestly i didn't have any issues until now... It can't be the Power Supply can it? I mean I've been playing for so long and it only happend during cutscenes. While exploring I never crashed 

Power supply is good, don't worry about that, a lot of people think that shutting down and restarts are PSU problem but mostly they are not.

Game have problem with certain confiigurations.

Did you tried disabling Origin overlay or go offline? Eventually you could try program called Outcome

Check energy saving settings and turn off everything you can.

Just to be sure you can download http://www.mersenne.org/download/ and run It for 30 min to check if CPU is ok, at certain situations It may be your CPU cooler and overheated CPU shuts down your PC instead of boom🙂

do same test with graphic card and if everything is ok there is no way that anything with your build is wrong, expecially if you can play other games without issues.

The age of the device makes no more difference about quality than the year that an automobile was produced.  There are twenty times more cheaply made power supplies in the marketplace than good ones.  A 350 watt Enermax is almost certainly better than a "700 watt" (claimed) "Chiefmax" is.   You don't really think that you can get that much good, high quality power for only $35 do you?  No, of course not! 

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@Danoniero wrote:

Power supply is good, don't worry about that, a lot of people think that shutting down and restarts are PSU problem but mostly they are not.

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In this case, it probably is.

A power supply is the heart of the PC and you should never save money on getting a cheap alternative. I can barely get any info on "Fonte Nox" PSUs aside from store listings. A Geforce GTX 970 and an 8 core processor need to be powered by a recognized quality brand. €43.30 for a 650W power supply? No, something's not right.

These are quality power supplies, according to Logical Increments:

Seasonic (all)
XFX (all)
Antec (Earthwatts series, Neo Eco series, HCG series, True Power New series)
Corsair (TX-V2 series, HX series, AX series)
Silverstone (Strider Plus series, Strider Gold series, Zeus series)
Cooler Master (Silent Pro Gold series, V series)
Rosewill (Capstone series)
EVGA (G2 series, P2 series)
FSP (Aurum series)
be quiet! (Dark Power Pro 10 series)
Super Flower (Leadex series, Golden series)

It might be the Power Supply but how did I managed to play the game for over 100 hours and now suddenly the power Supply isn't enough for my computer?

What Fred means is he can't find anything regarding Nox Fonte in English, and therefore considers them trash. (For the record, Fred, Fox Nonte is a rebrand of CWT - the very same CWT that make the power supplies you're recommending from Corsair. You're supposed to be an advisor here, yes?)

There's nothing wrong with your PSU, Noiko-san, the game is just horrifically broken right now, (and is getting worse with each patch.) If I were to advise anything, it would be a patch roll back or a reinstall without automatic updates, and check whether you get the same problems with the game on a fresh save file.

100 hours? When did the problems start? There's been a couple of patches very recently that have broken the game beyond belief for many of us. Patch 3 was Jan 19th, for reference.