What FPS will I get in Black Squad at 1440p?

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

Does GeForce RTX 5090 GameRock OC support DLSS or FSR in Black Squad?

Yes — Black Squad supports dlss2.

Yes — the GeForce RTX 5090 GameRock OC runs Black Squad at approximately 240 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 240 FPS @ 1080p Ultra (native). This GeForce RTX 5090 GameRock OC is currently $7991.00 at Amazon ↗