Thu Mar 25, 2021 7:28 am
CPU could certainly be part of it, but for initial launch the most likely culprit would be storage speed (SSD or HDD depending on which you are using).
If you are working with larger images than you used to, another contributor could be the amount of RAM you have -- for example, if you used to edit small images but now are editing larger ones, you may have exceeded the size that fits in RAM so it has to page off to virtual memory. That will make Photoshop slow down quite a bit.
Finally, if it's a very recent speed drop that you can't explain through file size, it could be a software update has changed how it works with your hardware.
Main System: i7-8700K, ASUS ROG STRIX Z370-E, 16 GB DDR4 3200 RAM, ASUS 6800XT, 1 TB WD_Black SN750, Corsair 550D
HTPC: I5-4460, ASUS H97M-E, 8 GB RAM, GTX 970, CRUCIAL 256GB MX100, SILVERSTONE GD09B