bitcoin325
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- Jun 25, 2025
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From my experience with several AMD graphics cards, if the TDP is limited to 60% of its original value, the graphics card operates in a normal state. My definition of "normal state" is when the hotspot temperature and GPU temperature do not differ by more than 20 degrees Celsius under full load, and the fan speed is at a reasonable 50% rotation. If running for extended periods, this temperature difference remains constant, with both hotspot and GPU temperatures rising synchronously. Of course, this TDP limit could be set a bit higher.
However, once a certain threshold is reached—in my experience, around 75%—the temperature difference becomes imbalanced. For every one-degree increase in GPU temperature, the hotspot temperature might rise by two or three degrees. Compared to 100% TDP, from a temperature perspective, it's just a difference in how quickly the temperatures increase.
My impression is that the power efficiency design point for the GPU chip might be around 60%. Manufacturers then found that even if they pushed beyond the design performance, it resulted in more heat but still remained within a functional operating range. After all, consumers are more concerned with price-performance ratio than heat, as long as the card operates normally.
I'm curious about higher-end graphics cards, such as the RX 9700 XT. If there's a "sweet spot" TDP for such a card, would it also be around 60%?
However, once a certain threshold is reached—in my experience, around 75%—the temperature difference becomes imbalanced. For every one-degree increase in GPU temperature, the hotspot temperature might rise by two or three degrees. Compared to 100% TDP, from a temperature perspective, it's just a difference in how quickly the temperatures increase.
My impression is that the power efficiency design point for the GPU chip might be around 60%. Manufacturers then found that even if they pushed beyond the design performance, it resulted in more heat but still remained within a functional operating range. After all, consumers are more concerned with price-performance ratio than heat, as long as the card operates normally.
I'm curious about higher-end graphics cards, such as the RX 9700 XT. If there's a "sweet spot" TDP for such a card, would it also be around 60%?
