First Thing to say, don't ask me why
I wanted my PC to be silent in idle, look like a regular Office PC and not having that big ATX footprint.
First I had to find a case. But that wasn't hard, the perfect case for me was right where I am everyday - at work.
So I got an HP Prodesk 400 G2 with a broken Motherboard from them, only to use the case and throw everything else in the dump.
I wanted to have a Ryzen 7 3700X. And because the Prodesk 400 G2 is one of the few HP PCs that use Standard formfactor Hardware, I would Need an mATX Motherboard.
The only X570 board that would suit this at this time, would be the Asrock X570M Pro4, which Looks kinda cheap-ish, and doesn't seem that great in Terms of VRMs and Features.
So I Chose to go with mITX, and bought the Gigabyte X570 I Aorus Pro Wifi.
I had to drill new PSU mounting holes, modify the front Panel connector cables on the case, Change the front USB out for a new one with a longer cable (still not working lol) and take the backplate of the Mainboard off, because it was colliding with the standoffs that are already installed in the case.
But all that was worth it, despite using the Wraith Max, the 40mm Fan on the X570 Chipset and reusing the 92mm HP 3 Pin Fan in the back, it is dead silent in idle
Under gaming load I don't care so much, because when gaming I wear my headphones, and those do a great Job of cancelling out the noise of the RX 5700 XT ^^
Sure, it's not as Special as building a full custom watercooling Loop inside an old Pentium 4 Case or something like that, but for me it is what I wanted, and I'm happy with it.
It Looks like a normal Prodesk 400 G2, just with a Ryzen 7 sticker on the front instead of an Intel one ^^
Managed to get the Front USB Ports working by changing them out for a pair of USB Ports from a Prodesk 400 G3 that I've got as a Test and salvage machine