Thanks for the prompt replies, much appreciated!
- No overclocking of any sort.
- Yes, I've been monitoring with OpenHardwareMonitor. Fan inputs and outputs are clear, I replaced and upgraded the case fans only a couple of months ago. There is a CM Hyper 212 Evo on the CPU (it's been there about as long as I've had the system but I replaced the thermal paste a couple of months ago).
- Games are purchased and up to date.
- System has been installed since August 2014. I've had the SSD (system drive) since January 2019, HDD (games/storage drive) since August 2014. The GPU has been in since January 2019, I used to have a Gigabyte Windforce R9 280 from 2014-2019.
- Have not tried reinstalling the games.
Event viewer log reveals the following:
(https://i.imgur.com/pORZH3J.png)
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>6</Version>
<Level>1</Level>
<Task>63</Task>
<Opcode>0</Opcode>
<Keywords>0x8000400000000002</Keywords>
<TimeCreated SystemTime="2020-04-18T19:13:53.847826200Z" />
<EventRecordID>25729</EventRecordID>
<Correlation />
<Execution ProcessID="4" ThreadID="8" />
<Channel>System</Channel>
<Computer>Syracuse</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>
<Data Name="Checkpoint">41</Data>
<Data Name="ConnectedStandbyInProgress">false</Data>
<Data Name="SystemSleepTransitionsToOn">2</Data>
<Data Name="CsEntryScenarioInstanceId">0</Data>
<Data Name="BugcheckInfoFromEFI">false</Data>
<Data Name="CheckpointStatus">0</Data>
</EventData>
</Event>
There are a bunch of instances of this, dating back to December when I got Fallen Order. Judging by the date/time codes this has been the event occurring for every one of these crashes (wasn't previously aware of Event Viewer).
I don't hear anything special when it crashes. The system just goes completely quiet, power LED turns off, then flashes back on and the system makes normal boot-up noises.
I don't have an extra PSU, unfortunately. The PSU is as old as my computer, bought it brand new in August 2014.
The following temperatures were taken after about 20 minutes of the Witcher 3 running, in an instance where it did not crash on load up:
(https://i.imgur.com/A6CJbTK.png)
(https://i.imgur.com/tgOjCGC.png)