What FPS will I get in Grim Dawn at 1440p?

At 1440p Ultra native, expect around 170 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 4090 SUPRIM LIQUID X support DLSS or FSR in Grim Dawn?

Grim Dawn does not currently support upscalers.

Yes — the GeForce RTX 4090 SUPRIM LIQUID X runs Grim Dawn at approximately 229 FPS at 1080p Ultra (native, no upscaling).

✓Yes — Excellent

Expected: 229 FPS @ 1080p Ultra (native). This GeForce RTX 4090 SUPRIM LIQUID X is currently $3695.00 at Newegg ↗