Comment # 7
on bug 97556
from Dimitrios Liappis
To close the loop with my issue here, it appears that the Asus Radeon RX-550 doesn't have any PWM control. The fan speed is constant and can't be changed in Windows using the GPU Tweak II software either. A curious bit is that while the socket for the fan connector has 4 pins, only 2 are actually driving the fan (however, I have owned graphics cards before that were able to adjust the fan speed by adjusting the voltage using just the two +/- cables). After discussing with Asus Support and the shop where I purchased it from, we came to the conclusion that all 550 series cards in the market don't have PWM control whereas higher models do. I replaced it with a (Gigabyte) RX-560 which is very silent. `sensors` now shows the RPM for the card. My understanding is that all models starting with 560 onwards support fan control, regardless of the manufacturer.
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