The Acetek 92mm is both wonderful and terrible - it works a treat cooling my i5-10600k overclocked, but getting it in and my m2 temperatures were troublesome.
1. Fit - there is a very small gap between the AIO, Noctua 92mm fan and the PSU which means fitting the cables is very hard. I went to the website PSlatecustoms.com and purchased a full set of custom made, unsleeved (this is key) Dan A4 cables - you tell Phil your setup and he handmake cables to the exact measurements for the Dan A4 - without this, I could not fit the cables in. The cables are not cheap and it cost around £15 shipping to the UK, which I would imagine would be similar for France. However, top quality. https://www.pslatecustoms.com/collections/dan-a4-sfx;
2. Temps - My biggest issue with the AIO was that it meant there is a lack of airflow over the MOBO/M2 slots - I have the Asus ROG Strix Z490 which also said it has adequate M2 cooling, but in the Dan A4, it was not sufficent. I purchased a Noctua NF-A4x20 PWM 40mm 5000RPM fan to promote airflow. This reduced my M2 temps from 100 degrees to 65 degrees at load. It has also reduced CPU temps by a few degees.
I note that I am also using the 3080 FE, which adds heat in my set up.
You can see the 40mm fan top right in the below:
[MEDIA=imgur]a/XeY4a3y[/MEDIA]