What FPS will I get in Rust at 1440p?

At 1440p Ultra native, expect around 144 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 5080 GAMING SOLID support DLSS or FSR in Rust?

Rust does not currently support upscalers.

Yes — the GeForce RTX 5080 GAMING SOLID runs Rust at approximately 190 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 190 FPS @ 1080p Ultra (native). This GeForce RTX 5080 GAMING SOLID is currently $1899.00 at Newegg ↗