My current utility server for light tasks such as network printing, Pi-hole, device administration, and a private Discord bot. There have been several iterations of this system and its ancestors, including a Raspberry Pi and a Core 2 Quad PC. This is the current one. Pay no attention to the janky PSU mounting in the back...
Motherboard, RAM, and CPU are new parts. The others were already on hand, but the (rough) prices I paid for them over the years have been included for the sake of showing a realistic system cost.
So this iteration of Senko-san hasn't gone totally smoothly. I originally wanted to put it in an Antec ISK 110 with the integrated PSU. But the power button on the case I had was busted somehow, so I ended up using the Cooler Master Elite 110 left over from my main desktop upgrade, plus a weird Enhance Electronics SFX-0540J2 PSU that I impulse-bought a while ago, but which seems to be of acceptable quality.
The SFX-0540J2 technically has SFX dimensions, but it's rotated 90 degrees vs a normal SFX PSU, so the narrow end comes out the back of the case instead of the wide end. I have never seen this before, and I have no idea what use case it could possibly serve. A strip of holey scrap metal, a long tapered screw, and an SFX-to-ATX bracket hold it in reasonably well.
For some reason, the DisplayPort works but I can't get video output from the HDMI port. If I have just an HDMI monitor plugged in, I get several beeps from the PC speaker, and no POST. I should look into that at some point, but I only need one video output for now since it's a server.
The picture of the back is of a different system that I had assembled previously, as a stopgap for this one.