Open NAS case for ATX

I had some old ATX motherboard with CPU and memory laying around that were not quite powerful enough for a desktop anymore. I didn't want to throw them away so I turned them into a NAS that I can place in my small rack cabinet. This is a personal project and I doubt anyone still builds servers out of old desktop hardware when there are things like NUCs and Raspberrypis available. I decided to upload it anyway if someone might find it useful. If you decide to make one I would be happy to help with assembly. There are multiple kinds of different braces and fan adapters to choose from.

I printed the case parts from ABS for heat resistance but I think even PLA might hold up if you have good ventilation and you should anyway. I used TPU to print the hdd mounting rails to help with vibrations and made some washers for the fan too. You should either print some feet to glue under or use rubber feet like I did. All parts except the longest braces fit a 240x240 print bed. No supports are required but you may need to clean some holes a bit. The motherboard mount is printed in two pieces but should not be necessary to glue as it is held down by screws.

The case should support most standard ATX (not EATX) and smaller motherboards and ATX PSUs. It has room for 8 3,5" HDDs and there are brackets to hold 2 140mm fans. Hardware required for assembly is some M3 (M4 is better for fan installation but not absolutely necessary) heat inserts and socket head capscrews. There are holes for optional 3mm LEDs for power/hdd.

The design goal was to have all components packed in a small form factor as the space I had is very limited. 8 drive slots was a compromise to keep the height down but still to have room for later expansion. In theory there would be maybe room for 2 more drives on top of the PSU but that might interfere too much with airflow. I didn't make caddies for the drives as I don't do hotswaps and I have to shutdown the system and remove it from the cabinet to add drives and I don't do that very often. Also you have to remove the fan to get to the hdd screws and fanmount too for the lowest hdd.