1280 x 800 minimum (at 100% UI scaling); 1920 x 1080 or greater recommended.
If you have a , stay on Photoshop CC 2020 or earlier. But if you want the AI magic of 2022, treat yourself to: system requirements for adobe photoshop cc 2022
This is where Photoshop feels snappy. If you work with 50MP camera raw files, digital art with 20+ layers, or 3D textures, aim for this tier. 1280 x 800 minimum (at 100% UI scaling);