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Hi Rob,
Thanks for reaching out. We are here to help!
We understand your workflow includes working on large documents. Hardware capacity might become an overhead quickly in these situations. Try optimizing Photoshop's performance to utilize the hardware to the fullest. Check this article: https://helpx.adobe.com/photoshop/kb/optimize-photoshop-cc-performance.html
Understandably, you might also have to upgrade the hardware in the longer run. Check the recommended system requirements, and that should give you the idea from here: https://helpx.adobe.com/photoshop/system-requirements.html
Please feel free to check with independent online benchmarks and reviews before making any purchase decisions.
We hope this helps. Let us know if it does.
Thanks!
Sameer K
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What you need to consider is that Photoshop is mostly bandwidth-limited, not CPU limited. It handles a massive amount of data and this is what slows most people down. In addition, lots of functionality is handled by the GPU these days.
The single most important thing when working with large files is the scratch disk. Make sure you have plenty of space on a fast drive (NVMe). Without enough scratch disk space, Photoshop grinds to a halt.
For these file sizes, you should have at least 1 TB free space available.
As for RAM, there is no such thing as "enough" anyway. The scratch disk will carry the heavy load, while RAM is more of a cache to keep the flow going. Personally I think 64 should be enough, but go to 128 if you feel like it.
The GPU is becoming very important for overall functionality and performance, but on Mac this is all integrated in the M1 architecture and I'm not up to speed on that.
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Thank you for your usefull input on this matter. We will wait for the new iMac Pro with M1 and 64 GB of Ram, that should do the job.
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An M1 Pro/Max MacBook Pro would be the ticket right now.