Guys can I get some advice on air cooling the M1. I am likely going with an AMD 5900x or 5950x and a 3080 or 6800xt.
I did some research and the Noctua NH-U9S with a second fan seems good for the cooler. Anything better?
Any advice on other fans and the best orientation?
As another user stated, use M1AF build guide
and M1AF cooling config tests
It is extremely thorough and helped me alot.
NO, the C14s on ANY ITX motherboard (B450, X470, B550, X570, etc.) will need to be used with a 120mm fan in order to keep the PSU in the stock position. I have seen someone cram the stock 140mm fan in there and leave the PSU in the stock position, but it causes tension on the cooler and bends it a bit. Not something I would recommend.
The only other way to mount the C14s is in a vertical orientation with the kit you can buy from Noctua. But I haven't had any luck with that kit and my Gigabyte B550 itx board. It's default cooler orientation or nothing with the board, cooler, and GPU that I have.
This is correct.
I just built my build in January with C14S, 120mm, 5900x and the side mounted PSU.
The parts you will need to request from Noctua support are:
NM-SFC14 - this is the mounting clips for the 120mm fan on the C14S
NM-AMB9 - this is to mount the C14S in vertical orientation so you can use the 140mm fan (with the side mounted PSU)
Get support to send them at the same time, it took me approx 4 weeks from order (that included over 2 weeks of waiting for the actual part to ship).
Just be careful which B550 motherboard you select, some of the other boards have a higher mounted cpu socket. This causes the C14S to be to tall to fit in the ncase.
There is a list somewhere that shows this.
I believe the gigabyte and MSI? have this problem.
But the asrock (double check this) and asus are ok.
I have the Asus B550 ITX and the C14S fits great.
One thing to take note of is the RAM clearance, gskill trident neo Z modules JUST fit under. I had some Corsair vengeance modules and they're too tall and hit the fan.
Also as mentioned above, keep the ram height in mind. I used the Corsair vengeance LPX, which had enough clearance.
Hope this helps