I can't see anything wrong there, according to a reliable vid on YouTube, the 3700X should get up to 90ºC on AIDA and 72ºC while gaming with the Prism. This is a comparison vid between AIO versus Prism with the 3700X.
https://www.youtube.com/watch?v=VGPYVUEz-_E
I use the Prism (which is not bad) because I'm waiting for the Ryujin II 360 to go on sale.
You can see my fan curve here in my vid
https://youtu.be/yVFjvizChrw?t=98
I never let the Prism reach full speed before 75ºC, normally its waves between 1100-1300rpm and 74'ish while editing/rendering. Gaming always sub 65ºC although, I have it undervolted and with Noctua case fans plus high airflow case.
There's is quite some topics lately due to CPU temps, have a look on the forum.
The Englishman