Try to not remember. Try command as "oc" option... As i see, on Russian forum example, they put it in AMD settings for Gigabyte RX 5700...
I tried. And even reboot rigs. No any result with Sapphire Nitro+. And I tested it command with Gigabyte 5600 - leds turned off same as NVIDIA 10xx series. Problem with Sapphire and i dont see any decision.
