PC Crashing when gaming. How to figure out why?

Hi.

I have recently just upgraded my PC with a new Mobo, PCU and RAM. Since this upgrade I have started experiencing crashes. e.i. PC shutting down without a warning. I have tried a few things such as changing around the fans in the case to improve airflow, remove overclocking of PCU and RAM, running GPU stress tests with Valley Benchmarks and FurMark. However none of the tests or alike have given me the answers I've been looking for. So here goes. My PC Specs are as follows:

• 
  Intel Core i7 6700K @ 4.00GHz (Skylake)
  HyperX Fury 16 GB (2 sticks @ 8 GB) DDR4, 2133 MHz
  Asus ROG Maximus VIII Ranger (LGA 1151) MOBO
  EVGA GeForce GTX 970
  XFX ProSeries XXX Edition 850W PSU
  2 SSDs (250 GB og 500 GB)
  2 HDDs (2 TB og 1 TB)
  2 monitors (DP og HDMI)
  Windows 10 Pro

The crashes have occurred when playing the following games:

• 
  Diablo 3 (+Expansion: RoS)
  Rocket League
  Tom Clancy's The Division

I am however not sure that it won't happen when playing other games. Originally I thought it had something to do with overheating, but after performing stress test I have not been able to either confirm or deny that this is the problem. I have tried moving around the fans to create a more consistent airflow, but it haven't seemed to have any effect.
My idle temperatures are as follows:

• 
  PCU -> 34-40 degrees C
  MOBO -> 28 degrees C
  GPU -> 40-43 degrees C
  SSD'er -> 30 og 33 degrees C
  HDD'er -> 31 and 35 degrees C

During stressing the system I have noticed the following temperatures:

• 
  CPU -> up to 60 degrees C
  MOBO -> up to 40 degrees C
  GPU -> up to 80 degrees C
  SSD og HDD -> practically unchanged

Both my GPU, CPU and RAMs are available for overclocking but since I started having these problems I have disabled that and even under clocked my GPU slightly. I have also tried downloading the newest drivers for GPU, Motherboard and SSDs. Without any success. I have yet to try and update the BIOS, which I might try later today.

Does anyone have any suggestions on how to find out what is causing these crashes?

EDIT:
Under critical events in the event viewer I find the following:
Event ID: 41, Source: Kernel-Power, Log: System.. followed by the amount of occurences.

It has in total happened 41 times and this is the XML Details:
- <Event xmlns="http://schemas.microsoft.com/win/2004/08/events/event">
- <System>
<Provider Name="Microsoft-Windows-Kernel-Power" Guid="{331C3B3A-2005-44C2-AC5E-77220C37D6B4}" />
<EventID>41</EventID>
<Version>3</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000400000000002</Keywords>
<TimeCreated SystemTime="2016-07-13T14:29:33.653076300Z" />
<EventRecordID>5723</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>HAMMERBAKHOME</Computer>
<Security UserID="S-1-5-18" />
</System>
- <EventData>
<Data Name="BugcheckCode">0</Data>
<Data Name="BugcheckParameter1">0x0</Data>
<Data Name="BugcheckParameter2">0x0</Data>
<Data Name="BugcheckParameter3">0x0</Data>
<Data Name="BugcheckParameter4">0x0</Data>
<Data Name="SleepInProgress">0</Data>
<Data Name="PowerButtonTimestamp">0</Data>
<Data Name="BootAppStatus">0</Data>
</EventData>
</Event>