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Any idea how many threads Photoshop can use at most? this is useful information for choosing a CPU
For example, is it better to choose a 2.5GHZ 40 thread CPU or a 4.0 GHz 12 thread CPU? Photoshop will be faster with what type of processor?
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A fast and efficient disk configuration (NVMe, PCIe 4.0) has more direct impact on operational speed than a fast CPU.
As for CPU, an i7 is the sweet spot. Above 8 physical cores you'll have rapidly decreasing return on investment. It won't be worth the cost - although it might pay off for a more CPU-intensive application like Lightroom Classic.
In any case, more and more tasks are performed in the GPU these days. Again, you don't need anything high end, but you do need a current and capable GPU. Again, there's a sweet spot: Nvidia RTX 4060 or 4070 (or the previous 3000-series).