https://www.pcgamer.com/thermaltake-tweaks-its-wall-mountable-case-for-better-cooling/

My main PC is housed in Thermaltake's original Core P5, an open-frame chassis that can be mounted on the wall (mine stands vertically on a desk). Since it came out, Thermaltake released a follow-up model, the Core P5 Tempered Glass Edition, which swaps out the acrylic window for a tempered glass one, and adds three more to the sides and top. Now there is yet another version of this case available, the Core P5 Tempered Glass T1.

The newest variant ditches the side and top windows for better cooling, leaving it with a single, large front glass panel. In that way, it's basically a tempered glass successor to the original Core P5 that I've been using for the past couple of years.