[doubt with heatpipes]

Hi comunity I was thinking in if there is something inside the heatpipes of the coolers market, something like a gas (freon or other) or liquid or just air.

The same doubt with the heatpipes of motherboards.

 

 

What's inside?

 

thanks in advance.

For your typical computer heat pipes (CPU, GPU cooling) distilled water is used. A few use Methanol, but mostly water.