How many CPU cores can PS use?

Forum|Forum|12 years ago
December 15, 2013
2 replies
69897 views

How many CPU cores can Photoshop CC (version 14.1) use at a max running on Mac OS X Mavericks‎? I have even looked into the PS tech specs but it only states multicore. Many thanks.

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Chris Cox

Legend

Photoshop uses all the cores it can, when it would speed up the operation.

But some operations slow down with additional cores, and some operations can't benefit from threading at all.

Trevor.Dennis

Community Expert

I 'think' the answer is as many as you can throw at it, but only with particular processes like some of the filters. I can easily see 6 cores in use, but only rarely all 12 threads with Photoshop, and never even close to maxing out CPU and memory. This is with a 3930k @4.2Ghz and 32Gb RAM with Windows 7. The GPU makes a difference nowadays of course. My system is a couple of years old and uses a GTX570 running at standard clock speed.

Other Adobe apps like Premiere Pro and After Effects will definitely gobble up all the system resources it can get its hands on.

PIXELREMIXAuthor

Participating Frequently

Ok yes 3D rendering in PS can use all of your cores there is no limit. But what about the filters that are multicore capable? How many cores can they use?

Trevor.Dennis

Community Expert

I am wondering if CC has been further optimised for multi core, because AFAICR these results show more CPU use than the last time I bothered to check. That would probably have been with CS6

Image size (1000 pixels square to 10,000 pixels square)

If memory serves, the lens blur filters made good use of system resources. This was with Iris Blur

I tried a few other filters on the 10k pixel image, but couldn't test my system enough to get a meaningful result. I can hear my GPU fans ramp up with various actions even before I put them to serious use. (I think the system starts working really early in the process.)

I am assuming that Apple OS are similar to Windows. Was there a specific reason you wanted this info, or just out of interest?

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