Hey
@leeince
Is the crash 'game specific' or is it replicated in any other games?
You'll need to run a few diagnostics - most obvious being your CPU and GPU temps - do you have any monitoring software and a couple of synthetic stress tests (i think you have core temp)?
We need the idle temps of both the CPU and GPU and then again when under load - this may have to be done/observed quickly if it is a thermal problem.
For speed try a couple of brutal synthetic tests -
prime 95 for stressing the CPU and
MSI Kombustor (you'll need to scroll down to the bottom of the site to get to the link) for making the GPU sweat.
Have the monitoring software running at the same time (Kombustor will do this within the software) - watch the temps closely. If it's thermal issue it will show up very quickly - likewise if it's a fundamental component flaw (but not always guaranteed) - but we're really just exploring temps for now. You will only need to run each test for 15 minutes for thermal testing as both will stress each component far more than any game so the heat generated within the cores will be very quick.
The other test you may want to consider running is
memtest - this will tax your memory but unlike the other tests this is best left to run overnight unless it gives up errors straight away.