Rendering causes computer shutdown

Hi All,
When I try to render my project my computer is switched off unexpectedly.
I tried to divide my project to two and I managed to render it by this way.

But now I faced with this problem again - I can't render the first half of my project.
After approximately 10 minutes my computer is shut down.
I tried to render it by script generated by kdenlive, but result is the same.

Any idea?

My system is openSuSE 12.2 AMD 64 bit


Is it possible that you have a processor temperature problem?