17.2.1 RX 480 8G Fan curve It stopped working

I did an upgrade from 16.4 crimson, the fan cruve on wattman configuration it no longer works.


The temperature on heaven benchmark, one loop,is above 75 degrees with a maximum of 900 rpm. When before it did not exceed 60 degrees


I can not even understand how this is configured really, I've tried many configurations, But I can not get it back to 16.4 driver performance.


I have win 10, I do not have any third party programs, i do not install relive either.


I have a Sapphire nitro NO OC


Many thanks