What FPS will I get in No Man's Sky at 1440p?

At 1440p Ultra native, expect around 180 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 4090 Phantom GS support DLSS or FSR in No Man's Sky?

No Man's Sky does not currently support upscalers.

Yes — the GeForce RTX 4090 Phantom GS runs No Man's Sky at approximately 240 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 240 FPS @ 1080p Ultra (native).