I have a question. Does long-time rendering (3D animations) damage CPU? Or make it slow or reduce its life? I am not talking about network systems or big computers used in animation companies. I'm talking about my PC. When I started rendering my 3D animation with Maya, the fan of my CPU noises and when I opened the Task-Manager window, the CPU usage was in 100 %. So I has been worry and came here to ask.
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Simple answer: No.
CPUs have provision for overheating — They'll shut down before any damage is done. Unless you're running things really, really hard, it's unlikely you'll have any issues during the normal lifetime of a CPU. You'll likely want a replacement before anything goes wrong.
If you're using a PC, maybe a fan/cooling upgrade would be a good idea, if you think it's struggling.