Kernel power shutdown and restart while playing ArmA3

In the past week, I've gotten several Kernel power crashes while playing ArmA3, where my PC would shut down and then restart.

I monitored and logged my stats with Open Hardware Monitor and set a warning for CPU overheating at 70°C, but it never went off. PSU voltage remained unchanged at the point in the log where my PC shut down.

I ran one pass on memory test that returned no errors.

This only happens when I play on the Comrades in Arms server running ArmA3 with several addons.

Addons that I ran are listed here.

edit: also happens while playing vanilla ArmA3.

The Kernel power error:

- System 

 - Provider 

  [ Name]  Microsoft-Windows-Kernel-Power 
  [ Guid]  {331C3B3A-2005-44C2-AC5E-77220C37D6B4} 

  EventID 41 

  Version 2 

  Level 1 

  Task 63 

  Opcode 0 

  Keywords 0x8000000000000002 

 - TimeCreated 

  [ SystemTime]  2015-01-31T20:19:30.048815000Z 

  EventRecordID 397642 

  Correlation 

 - Execution 

  [ ProcessID]  4 
  [ ThreadID]  8 

  Channel System 

  Computer marko-PC 

 - Security 

  [ UserID]  S-1-5-18 


- EventData 

 BugcheckCode 0 
 BugcheckParameter1 0x0 
 BugcheckParameter2 0x0 
 BugcheckParameter3 0x0 
 BugcheckParameter4 0x0 
 SleepInProgress false 
 PowerButtonTimestamp 0 

My CPU-Z details:

http://pastebin.com/G2Fv9iRn

Yeah, it looked to be overheating due to dust. All fine now.

Actually, that wasn't the case. By the looks of it, PSU was on it's way out and I replaced it with a new one.

edit: nvm