The angled ATX Power completely solves the problem of excessively lardge power cords on the motherboard and makes the wiring more beautiful.
Which will solve the PSU installation for the limited height chassis
You can install the 24PIN power cable from vertical to horizontal direction with this adapter
Overmold ATX 24Pin Female to 24pin Male 90 Degree Power Adapter Mainboard Motherboard for Desktops PC Supply
The adapter is designed for changing ATX 24PIN cable installation direction