Decided to give the case another chance, after the Torrent's front fans developed slightly clipping regardless of rpm, same issue with bottom fans.
Long story short, was trying to avoid watercooling, as my GPU, supposedly, only have one waterblock available which I didn't like.
Noctua NH15-S + 4 x NF-A 14 Chromax + 6 x NF-F12 Chromax. Yes, loads of money on fans, but still cheaper than the custom loop, minimal maintenance and less likely to give issues.
Fans at 40% across the board, room temperature of 21C, 3DMark, various test, maximum CPU temperature was 72C. The CPU is a 12700K, motherboard MSI Z690 Tomahawk DDR4, all stock. The Sapphire RX 6800XT Pulse, also stock, maximum 67C.
Pretty impressed, as the system is pretty quiet, temps are fine.
Quite sure playing a bit with voltages may improves things further, but that was my worst case scenario, as I usually cap FPS at some point, and the CPU won't be pushed as far as the CPU test did.
One thing I notice was regarding the HDD cage. The previous O11 Air mini I got, which had the defective USB-C cable, the cage was secured by screws. Now it uses rivets.
The only criticism I have about the case, is the lack of modular covers for the side intake. Removing the supplied covers and installing 2 x 120mm fans, the gaps at the bottom and top of the fans affect some potential performance, but worst for me, visually would be nice if no gaps were visible. Can "fix" it modding the supplied covers, but I don't intend to chop anything yet.