Hey
@Nanook !
Here the A12x25 mounted with the clip under the L12s.
And thanks to Noctua do have sent me the mounting bracket of the L12!
I think I am lucky! As you can see on this motherboard the clearance is 99.8 % perfect! Only the WiFi slot push 1mm, but I am able to keep the fan in place anyway. (As you can see from the top there is a slight rotation of the cooler, but that really doesn't matter. I could even slide a bit the fan out of the L12s guide and that's it, but I guess is ok!
I can only recommend this Motherboard and this AMAZING case!
A few temps after 20 minutes of Prime95 v29.8,
Smallest sFFT and fan's BIOS profile set as QUIET:
Noctua A12x25 1600RPM max
CPU locked at Intel specs, 75 degrees MAX at 95W and 3.8/3.9GHz an all cores/threads.