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How many degrees C is ok on the GPU?

Hi!

I just fixed an early 2010 iMac aluminium with a new graphic card and i'm just curious how high temperature it's safe to run the GPU?

When i boot i will get around 45c on "graphics processor chip1" and now it's up on 69c ..

And, will the mac shut down if the GPU getting to hot?

Best Regards

Billy

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69C is abnormally hot for a chip that is just idle. I would open up the computer and check for dust/debris blocking the airflow through the computer. Also, replace the thermal paste on the GPU if possible. My desktop PC has a Radeon HD4870X2 (A notoriously hot card) which barely breaks 70C under full load, so something is definently wrong. Your computer should shut down if it detects that it is overheating.

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