What FPS will I get in Stellaris at 1440p?

At 1440p Ultra native, expect around 0 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 4090 SUPRIM X support DLSS or FSR in Stellaris?

Stellaris does not currently support upscalers.

Yes — the GeForce RTX 4090 SUPRIM X runs Stellaris at approximately 0 FPS at 1080p Ultra (native, no upscaling).

✕No — Too Weak

Expected: 0 FPS @ 1080p Ultra (native).