What FPS will I get in Warhammer 40,000: Space Marine 2 at 1440p?

At 1440p Ultra native, expect around 89 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 4090 AERO OC support DLSS or FSR in Warhammer 40,000: Space Marine 2?

Yes — Warhammer 40,000: Space Marine 2 supports dlss2, dlss3, frame_gen_dlss.

Yes — the GeForce RTX 4090 AERO OC runs Warhammer 40,000: Space Marine 2 at approximately 125 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 125 FPS @ 1080p Ultra (native). This GeForce RTX 4090 AERO OC is currently $3149.95 at Amazon ↗