GPU explain

Can someone explain this to me?

Ryzen 9 7950X3D 16-Core Processor

NVIDIA GeForce RTX 4090
PC Client: 1.57.3, Date: 2024-03-28
Duration: 1 hr 38 mins, Crowdedness: 28%

Makuri Islands

Ultra + 2160
Max FPS 61
Avg FPS 59
P1 FPS 51

Im switching next year after the release of the 5090 my current 4090 to my Zwift pc, but after seeing this I have to think twice about that move.

I find a lot of these results at Zwiftalizer with a 4090.

Looks like the refresh rate is set to 60Hz

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You are well over spec for what you need for Zwift, I have an old 1060 at Ultra/4k that averages about 45 FPS.

Im running Zwift at the moment with a AMD 7600 cpu and a Radeon 7800XT. Ultra graphics and a 4K screen.
When the ride is crowded its hits the 60-70 fps

In packed events the CPU is the primary limiter of frame rates

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Zwift only uses one core of the processor as well.

What is the opinion about a X3D cpu from AMD?