What FPS will I get in Cities: Skylines at 1440p?

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

Does GeForce RTX 4090 iChill X3 support DLSS or FSR in Cities: Skylines?

Cities: Skylines does not currently support upscalers.

Yes — the GeForce RTX 4090 iChill X3 runs Cities: Skylines at approximately 0 FPS at 1080p Ultra (native, no upscaling).

✕No — Too Weak

Expected: 0 FPS @ 1080p Ultra (native).