Question Passive cooling / thermal exchange / heat disspation calculation

Jan 25, 2019
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Hello,

so i guess the question is really simple.

I would like to calculate what the dimensions of a passive cooler to cool my card should be.

For instance if i have a gpu gtx 1050 ti which draws 75 watts (100 watts peak), its surface is 200cm2, outside air is 25C and i would like to keep the card below 90C all times.
What should be the dimensions of an aluminium block (thermal conductivity of aluminum is 170 W/mK) to cool my chip?

Assuming there is sufficient space inside the case.

I assume this is a subject in faculty of mechanical engineering - heat exchange.

Thanks a lot,
Rok.