What FPS will I get in Resident Evil 4 at 1440p?

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

Does GeForce RTX 5090 OC support DLSS or FSR in Resident Evil 4?

Yes — Resident Evil 4 supports dlss2, dlss3, frame_gen_dlss.

Yes — the GeForce RTX 5090 OC runs Resident Evil 4 at approximately 240 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 240 FPS @ 1080p Ultra (native). This GeForce RTX 5090 OC is currently $4334.20 at Newegg ↗