FurMark - 6850 overheating

[OCNewbie]

One thing in this thread got me thinking...

Why should ambient/room temperature affect LOAD temperature? for idle temp, sure, but for load temperature? the only thing that matters is the heatsink's dissipation ability and the heatsink+case airflow to prevent buildup.

I mean, the load temp is far far above ambient temp (relatively). logically, it shuoldn't matter as the chip is producing X amount of heat (in watts) under load regardless of where its operating. amiright?
so the difference in MAX LOAD temp between a 20C room and a 30C room shouldn't be that big.

obviously i'm not talking about running the chip inside a deep-cool freezer.

I would think the load temp difference between a 20C room and a 30C room would be 10C. The ambient air directly relates to the temp of the air being sucked into the case that ends up passing over the heatsink fins. The cooler that temp is, the cooler the components inside should run.

 

[Rifter]

I would think the load temp difference between a 20C room and a 30C room would be 10C. The ambient air directly relates to the temp of the air being sucked into the case that ends up passing over the heatsink fins. The cooler that temp is, the cooler the components inside should run.

yeah, the ambient temp will effect the load temps in a linear form. If you have a 30c ambient and a 70c load you would have a 60c load with 20c ambients.

This is why most websites now list degrees above ambient instead of max load degrees in there heatsink testing.

When you are cooling with air how could you think that the temp of that air doesnt make a difference, it surely does.

 

[Borealis7]

i'll make a distinction:

i'd think that because the chip is producing a fixed amount of heat at load (through the Watts it consumes and the work that it does) and that heat output, which is dissipated by the heatsink into the case, can make the temperature inside the case rise. for the air inside the case ambient temperature is important, but not for the temperature inside the chip. logically, that would only be determined by the chips "efficiency" in converting electricity to heat, and it's attached heatsink capability of "moving" that heat away. no air is passing near the chip itself, because its covered with the heatsink.

we're gonna have to take this discussion to Cases & Cooling soon.