now +33h PM working great ~64.4mh/s / ~48°C 51%rpm / 116W (MPT) and the fan issue resolved by asking PM to not manage the fan speed with -tt 0 (I also later added -cfm 1 but yet not tested). this means the fan speed is managed by Adrenaline which doesn't bother me. The only scenario that is questionnable is if windows crash and restarts. This is why I saved a profile in MSI After Burner and checked the option to maintain the OC when Windows restarts.
So problem solved. happy to come back to Phoenix.

https://i.imgur.com/1yAG516.jpeg