poor performance Premiere pro

@Türkan273537108zup , try this recommendations first:

 https://community.adobe.com/t5/premiere-pro-discussions/adobe-premiere-pro-2021-playback-lag/m-p/11919410?profile.language=en#M336981

Also, I suggest to follow this guide for better performance in general:

Not all effects are GPU accelerated. And order of effects matters. To make render/export faster, follow these rules:

#1. Ideally don't use CPU-effects at all (keep a timeline "yellow" = maximum speed mode)

#2. If you can't avoid using CPU-effects - don't mix up CPU- and GPU- effects in the same adjustment layer. Doing so will switch rendering into "software only" mode (=very slow). GPU and CPU effects in two different layers. Put "GPU-layer" on top of a "CPU-layer". This way GPU-acceleration will actually work

#3. In case of applying effects directly to a clip without adjustment layers: organize effects in a way that all GPU-effects are applied after CPU-effects

#4. If by all means you have to use some CPU-only effect on top of accelerated ones - then split the job on 2 parts: first you export the timeline with accelerated effects, then re-import and add that necessary CPU-effect (s). This way it'll be much faster than CPU-only render in one pass. (or use render-&-replace instead of export-import)

#5. One more thing. PPro often consider 3rd party effects as non-accelerated even if they use GPU for rendering (Twixtor, RGMB suite, etc ). Use the following as the criteria of non-accelerated effect - its addition turns render bar from yellow to red.

...and also tell us what you have tried.

Hardware is only a small part of the equation. You can share the full specs of your system, Premiere version, but very importantly: what kind of media are you working with and what are you doing with it in the timeline?