I don't think getting an SFX power supply (which have become pretty mainstream, as it's obvious that nowadays ATX is just a waste of space) is an obstacle for people who are interested in niche and expensive SFF cases. If it were a mass-produced coolermaster - maybe. But the 99% number is most definitely not true, simply based on looking at the builds in cases that support both sfx and atx.
Antways, good luck with the project, I was just sad that it wasn't what I was looking for after all
Thank you, no problem
I would say that a lot of people will benefit from ATX psu support, since many are downsizing, and we must admit that even though SFX psu's are more mainstream now, they are still harder to find, have worse pricing, and lower power. In some countries they are either impossible to find or you only have a few options with terrible price. Also, I didn't loose anything with including ATX psu support, so no problems there, you have a choice and that is a good thing in any case
I like details and symmetry, so I will comment on some...
- Consider positioning the power connector plug like on the P-ATX V2, i.e. vertically above the motherboard I/O area. I think it looks much nicer here, compared to having it above the motherboard. It might also help free up some space to allow positioning 2*80mm fans at the top?
- In one of the pictures, a top 80mm fan is visible, but you can see the fan mounting holes on the right side, making it look asymmetrically mounted? If you know what I mean. I would prefer it mount/look symmetrical there. You probably try to take advantage of the grill at the top for mounting, which causes this. But consider providing additional fan holes in the sheet metal, instead, is possible. Perhaps also consider 92mm fans if possible, since they are more common.
- Consider offering a SFX back mounting bracket when the SFX power supply is positioned at the bottom, where the graphics card usually is. Will make it look a bit nicer.
Other than that I think it looks nice. It's a bummer that 170mm PSU:s don't fit, since I have trusty fanless Seasonic 170mm.
Thank you for your comments! Now we are getting into some design choices I had to make. I mostly agree with you, but I had to do some of these things for compatibility and manufacturing reasons.
Like for instance, mounting of top 80mm fans is conditioned by the top grill and the way that he mask works. 92 mm fans would be extremely tight, there is 92.8mm of space without accounting for paint and tolerances, so you will maybe be able to friction mount it ?
Only option here would be to provide additional bracket for mounting fans from the bottom, but I would have to think about it.
Regarding AC connector mounting, I will probably have to tweak that to allow for >135mm gpu's in 4-slot mount to fit properly.
SFX bracket for bottom position, yes I am planning on supplying it with upper gpu mount kit.
Counterpoint on the fans:
1. 92mm fans don't look like it will fit. The case is 98mm wide but some room is taken up by side panels and chassis flange.
2. The top fans are only held in by two fan screws. The set of left screws are covered by the front/top plate. It won't be possible to make it symmetrical like you said without radically changing how the front/top plate is assembled. Again, you need to account for access room. I have the V1 which has a similar arrangement for its top 60mm fan mount, and it works well. Your preference is not really applicable here if it requires re-engineering the whole top of the case and potentially having to re-design the front/top facade as well. I'd also like to add that having the fan mounts where it is currently gives you some room to hide the power cable extension behind the fans, making it rather tidy.
3. It makes little sense to place the power inlet above the motherboard, since it will limit your flexibility and available height for the upper PCI-e mount, in the case that you're making use of those (as well as potentially running foul of taller coolers). The PATXv2 power socket was placed where it is because of the reduced height available above the motherboard. Since the N-ATX increasees this clearance (back to P-ATXv1 levels, in order to accommodate fans), it makes no sense not to use this additional clearance for the power socket, it would be wasted space otherwise. Also, putting the power port above the board allows it to be centre-mounted, making it symmetrical (you seem to prefer symmetry based on your previous post). If anything, the suggestion would be to keep the cut-out above the motherboard like it is, but move it slightly horizontally to center it along the width of the case.
Thank you, you really understand the design, I couldn't agree more