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Creepus_Explodus t1_j2zy0eq wrote

Reply to comment by Blastoxic999 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

Essentially, yes. It's a protection mechanism for the GPU to prevent overheating, so it slows down to reduce temperature. Stuttering can have other causes though, so it's just an indicator that thermal throttling may be occurring. To actually validate it, you need some way to monitor the GPU temperature under load. You can enable an overlay in Radeon Software that shows your hardware stats during gameplay, or use some other software like GPU-Z or HWInfo.

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Blastoxic999 t1_j2zygn4 wrote

So what's the problem here with those AMD GPUs? The GPU overheats and it gets damaged? The GPU throttles too fast even tho it was not hot?

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Creepus_Explodus t1_j2zzgyz wrote

GPU junction temperatures are meant to be between 70-90°C on these air coolers. Thermal throttling should never occur unless something is seriously wrong. The card is designed to maintain peak performance at all times, while staying within the power and thermal limits. When a card thermal throttles it is exceeding its thermal limits, and must reduce its performance to maintain stability. Shutoff temperature is at 115°C, your card will actually just turn off to prevent damage when it reaches that temperature.

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Masters_1989 t1_j310sir wrote

Great series of responses.

That was very well said, and very helpful information for someone that doesn't know about GPUs like the person you replied to. Nice job - was a pleasure to see.

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onecrazyguy1 t1_j30pk04 wrote

I usually just drip water on some of the metal components and am careful to avoid the PCB.

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JaggedMetalOs t1_j31avgw wrote

The problem is you get terrible performance because the cooler isn't working, so the chip gets hot and slows itself right down to prevent damage.

Current theory is there isn't enough liquid in the vapor chamber so it stops working when the chip heats up.

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JCastin33 t1_j30139g wrote

From a few videos I've watched about it, it looks as though a part in it is not well designed, specifically the vapor chamber. That being said, I don't think AMD has come out and said what the issue is specifically yet.

Anyway, it seems like the vapor chamber gets locked up and stops cooling properly, resulting in temps climbing to 110°, and then the GPU slows itself down to try drop the temps, which fails, so it just keeps slowing itself further.

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