Showstopper Build: Greyscale — building a custom-looped ITX PC that pushes the form factor to its limits

Tom's Hardware is building an extreme Mini-ITX system in the 19-liter NCase M3 with an RTX 5090 and Ryzen 9 9950X3D.

The goal is to see whether a tiny case can realistically handle flagship gaming and creator hardware plus custom liquid cooling.

The parts list includes the MSI MPG X870I EDGE Ti Evo, MSI RTX 5090 Suprim, and a Silverstone 1000W SFX power supply.

A key test is whether the build can keep a clean look with a glass side panel and no external mounts.