What this is

The short version

One laptop-class GPU generates 2D game art on demand. You bring it up, generate, and hand the card back. Nothing is sent to a third-party service; there is no per-image charge; the weights are all open and stay on local disk.

The machine

That “Laptop” suffix is the single most important line in the table. A laptop 5080 is not a desktop 5080 with a smaller case — it is a different, power-limited part. Measured on this box, a warmed fp16 matrix multiply sustains 36.6 TFLOPS at 91 W with the SM clock sitting at 1290 MHz, against a desktop part’s ~2600 MHz boost.

In practice that is better than it sounds. Measured end to end at 1024² and 20 steps:

Seconds per image, not fractions of a second — which is fine for batching sprites and tedious for turning a dial and waiting.

It is a shared card, not a dedicated one

The same GPU hosts two always-on services:

Together they hold ~7.3 GB of the 16 GB, leaving ~8.7 GB if you generate alongside them. That is enough for SDXL and comfortable for SD 1.5, but not enough for the larger models.

So the stack evicts them on demand. comfy-up stops both and hands you the full ~15.3 GB; comfy-down puts them back. See Sharing the GPU for why this is safe and what specifically is not stopped.

What it is good at

• Sprites, item icons, portraits, and other small-canvas art in a consistent style
• Batch generation — dozens of variations while you do something else
• Tilesets and seamless textures
• Iterating on a look without a per-image bill

What it is not good at

• Interactive fiddling with the biggest models. At ~90 W, a large model at high resolution is a make-a-coffee operation, not a live dial-turning one.
• Being an art director. It generates candidates; a human still picks, fixes, and assembles.
• Perfect text. Legible words inside generated images remain unreliable.
• Editing. This box generates. Cleanup, palette work, and assembly happen on a desktop machine in Aseprite, Krita, or a tilemap editor — the GPU box is headless and has no GUI.

The honest cost

The electricity is negligible and the models are free. The real cost is your time: prompt iteration, culling bad generations, and hand-fixing the survivors. Treat the output as a fast draftsman, not a finished asset pipeline.