What FPS will I get in Blender at 1440p?

At 1440p Ultra native, expect around 0 FPS. With DLSS Quality you can push higher.

Does GeForce RTX 5080 GAMING SOLID CORE OC support DLSS or FSR in Blender?

Blender does not currently support upscalers.

Yes — the GeForce RTX 5080 GAMING SOLID CORE OC runs Blender at approximately 0 FPS at 1080p Ultra (native, no upscaling).

✕No — Too Weak

Expected: 0 FPS @ 1080p Ultra (native). This GeForce RTX 5080 GAMING SOLID CORE OC is currently $1349.95 at Amazon ↗