E8400 4GHz 9 hours orthos stable, but not in L4D

[Locky]

I think you need to get better cooling, then increase the volts on the cpu.

 

[rjk]

remember that the source engine is stressful on the cpu

does it do it in other games?

 

[mmj_uk]

You have to bear in mind that Orthos doesn't use the GPU at all and when running games you have the addition of a high-end GPU both heating up the case and demanding even more power, it's also going to be more stressful on the motherboard.