Poor Photoshop performance on large files - CPU or GPU?
Hi there,
I'm currently working with a massive ~650Mb 9300x2600px 72dpi RGB PSD file that has about 300 groups and 3000 layers on a Windows 10 PC equipped with Intel i7-8700 3.20 GHz CPU, integrated Intel UHD 630 GPU, and 32GB RAM, with the following preferences:

(Adobe Photoshop Version: 20.0.5 20190605.r.83 2019/06/05: 1206907 x64)
It is agonizing to perform almost any action. Whether it is moving layers/groups around, editing text layers, even selecting layers - Photoshop is lagging big time and overall is as slow as an old elephant.
When I was assembling this PC, I decided to invest more in CPU power and memory. I don't do any complicated stuff - no 3D, no video editing, nothing, just pure screen design (no print design either). That's why I don't have any dedicated GPU, and that integrated Intel 630 would be sufficient for Photoshop (or so I thought).
Now the question - is it really a time to buy a decent GPU to help out Photoshop a bit in its calculation efforts? Or am I missing some of the magic settings that would boost Photoshop when dealing with large files having only CPU calculation power at disposal?
Any idea and advice would be much appreciated.
