https://www.techpowerup.com/303231/gigabyte-stealth-500-pc-continues-to-grab-eyeballs-at-ces
 
A showstopper from Computex 2022, the Stealth 500 DIY gaming PC kit from GIGABYTE continues to grab eyeballs at the 2023 International CES, where it's been awarded for innovation. Imagine you've assembled a gaming PC but forgot to install a single power cable from your modular PSU—that's what the Stealth 500 looks like. You won't find a single cable sticking out when you view the motherboard from the left side panel. Every connector and header of the motherboard has been discretely wired out either using 180° inflexible backplanes, or the motherboard itself has some of its headers located on the reverse side of the PCB. Even the RTX 3070 graphics card included with the build has a discretely located power connector that remains out of sight when installed. The challenge with this build will be to give it a highly capable air CPU cooler, as even cooling tubing from an AIO could spoil the look!
 
That is such a clean look. However a CPU cooler of some type will be needed so you will have a minimal amount of wiring sticking out.