Computer totaly Stop while using animated procedural cloud

[npg]

I think I used the PRG model, yes. As I said, the sky is pre-computed on the CPU whenever one of its parameters is changed. The PRG model is simply much more compute intensive than the older models, so it stresses your CPU more or longer. We haven't had crashes related to the PRG model in our internal use or reported by other clients, so the issue seems unique to your setup.

[johan_hugele]

OK thanks for your answer, I ll stop use the PRG sky and will probably try to change my Psu, I'll let you know.
Have a nice day