@garousaitama i can do a ATX PSU support, there should be enough space, that would be a variant. 320mm GPU is not my target, the PCB of the cards mostly smaller than the cooler so they are smaller dann 300mm, but we will see.
A Morpheus with 25mm i have to check, i think its a little bit taller than my accelero extreme 3 and i build it now for this possibility.
@anilgulalan it is possible, the Ncase M1 has 12.7l and you can fit an aftermarket GPU cooler in it, the only bad think about it is that you can only use smaller CPU Air cooler, but you can fit an 240 AIO in it. The problem in this case what i see is that the airflow is a complete mess, what i have seen in some videos and on reddit the most user push the air out on the bottom, so you have to cool down the GPU with the heated air from the CPU or the other way round, that should be different in my case layout.
here is a video link to the Ncase M1 with accelero extreme cooler.
and here are a short update:
some parts are arrived but the laser cutting parts are still under progress