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2020 iMac 5K: Adobe Camera Raw Enhance Details
Related: 2019 iMac 5K, 2019 Mac Pro, 2020 iMac 5K, 4K and 5K display, Adobe Camera Raw, Adobe Camera Raw Enhance Details, GPU, iMac, iMac 5K, Mac Pro, Macs, memory, Photoshop, video
re: recommended Macs for photographers and videographers
re: 2020 iMac 5K: Recommended Models and Accessories.
MPG tested the 2020 iMac 5K 3.6 GHz Intel Core i9 10-core / 128GB / 2TB / Radeon 5700. Smart move: buy with 8GB memory, then add 64GB or 128GB OWC memory to save a ton on memory cost (same memory as 2019 iMac 5K).
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Adobe Camera Raw Enhance Details is a GPU-intensive task that uses 4-5 CPU cores as well. But the GPU utilization varies oddly across machines, as the screen shots show further below.
If below are out of date: view current Mac wishlist and all current OWC wishlists.
Results
See also How Much are GPU and CPU Cores used by Adobe Camera Raw Enhance Details?.
The 2020 iMac 5K does about 10% better than the 2019 iMac 5K. Perhaps the 5700 XT would do a nudget better, a few more percent—not worth the upgrade cost.
With the huge cost (over $2000) of the Vega II video card in the 2019 Mac Pro, the 28-core 2019 Mac Pro with Vega II video card gives a pathetic result in terms of cost/value.
But see the GPU utilization screen shots below...

GPU and CPU utilization
Below, toggle to compare: the 2019 iMac 5K shows 100% GPU utilization, whereas the 2020 iMac 5K only about 50%, and the 2019 Mac Pro only about 33%. What gives?
It goes to show that a “faster” GPU is only as fast as the application and operating system allow it to be utilized.


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