Here's one I did up for a new build, decided to resurrect the old "Transformers Action Figure" theme. You remember the packaging for the toys had a little "battle card" on the back, detailing the robot's main abilities and such?
Meet "Calculus", a Cybertronian infiltration agent and data thief. She (?) masquerades as a high-end gaming PC, in order to get close to vulnerable systems.
Background image was generated in Stable Diffusion. Typography elements done up in GIMP. (Decepticon logo courtesy of Hasbro.)
Sensor Panel is a 600x1024 image to fit a ROADOM 7" Raspberry Pi monitor board mounted to the rear of the case in place of the original exhaust fan.