Fuma 2 CPU cooler barely fits this case and on me its pushing the side glass out by 1 mm. Manufacturing tolerances might make it not fit for u.

At front of the case, top and bottom holes are blocked with piece of papers to make sure air moves back of the case.
PCIe covers are removed to not block any airflow.
Motherboard IO cover is removed to open another airflow path.

OCs
CPU: PBO On
RAM: 3800, 16-17-16-32-48-336 @ 1.375 V
GPU: 2000 MHz @ 1.1 V Undervolt