Mini Pc - Compact PC Case for Asrock H610M-HVS (mATX)

Mini pc with modern CPU are still very expensive, and they also have the disadvantages of using soldered CPU or sodimm ram.

I choose this board for the cheap price while still being compact, even if it's not an itx board 

https://www.asrock.com/MB/Intel/H610M-HVSM.2%20R2.0/index.it.asp

main characteristic of the case

• the pc is powered by a pico-psu and 12v brick for highest possible efficiency at idle and compactness
• front air intake and rear exhaust in thin form factor: a radial (laptop) fan provides cooling instead of the stock intel RM1 fan
• can be printed on an Ender 3 (235x235 bed) while still being a single base piece for maximum rigidity simplicity of assembly
• DB9325A-300W cheap pico-psu from AliExpress works well but requires disconnection of power good signal to the motherboard due to not respecting ATX specification on signal timing
• 12mm metal power button with LED
• I'm using a 5v PWM fan from Asus X55A, can cool up to 45 watts without thermal trolling at max speed, fan is powered by USB header while the PWM signal comes from the CPU fan header, it's completely quiet when idle at 20% PWM

A 35w limit in bios for power limit is required to use a 65w PSU without exceeding the rating. 

Other than the printed parts, assembly requires M2 brass threaded insert (3mm hole) and M2 screw for connection between front and rear panel to the body of the case, same size also for the fan support and fun duct exhaust.

also 6 m2.5 (3.5mm hole) brass inserts for mounting the motherboard.