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Comander_K33N t1_j310bmt wrote

Reply to comment by Creepus_Explodus in AMD says a “limited number” of 7900 XTX GPUs have a thermal throttling problem | Owners of cards with throttling problems are encouraged to contact AMD support. by chrisdh79

110c!! Holy moly. Old 3090ti would run at 70c, which was normal. At that temp my case was putting out some serious heat. Can’t even imagine 110c.

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JaggedMetalOs t1_j31b1ay wrote

The problem is the cooler isn't actually moving the heat to the fins, so the heat is trapped on the chip and so the exhaust temperature is probably cool...

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DeBlackKnight t1_j32ihr9 wrote

So for one, the heat coming out of your case is solely do to the amount of wattage being used. A card can run at 60c peak and still pump out 40c+ air if it's drawing 400-500w.

For two, we are talking about junction (or hotspot, in Nvidia's case) temp, not edge temp. I do not believe for a second that anything other than a watercooled 3090ti is running at 70c junction temp. If you're comparing a watercooled cards' temps to a reference cards temps, I don't know what to tell you.

I believe that the AMD GPUs in question actually maintain fairly decent edge temps, while actively thermal throttling due to junction temps.

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sonoma95436 t1_j377yov wrote

Also has to do with efficiency. Die size shrinks generally help efficiency. Heat is wasted energy. Optimized in a perfect scenario it would minimally heat.

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BobisaMiner t1_j3lxt92 wrote

In computer chips pretty much all energy ends up as heat. But it's also not wasted energy like it would be in an internal combustion engine.

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sonoma95436 t1_j3ndd43 wrote

Why not. In a ICE you can recover some wasted heat with a turbocharger. How do you recover wasted heat with a CPU? In fact you have to use more energy to cool it.

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BobisaMiner t1_j3ohwj6 wrote

Sorry I wasn't clear. My point was heat in a cpu is a by-product by design and yeah it's always going to be 100% wasted. I guess it heats our rooms, that's something.

But in an ICE where heat(thermal energy) is what is converted to movement.

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sonoma95436 t1_j3oy1wy wrote

In a ICE expanding heated gas from combustion is converted to mechanical energy but waste heat is inefficiency. More direct heat to energy would be a steam engine which is external combustion although steam is released which is a waste heat.

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BobisaMiner t1_j3lxk6d wrote

I'm pretty sure your 3090ti puts out more heat, since it can eat a lot more power(450W TDP). How hot the card gets has little effect on its heat output.

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