Denoise AI slows down dramatically after a few RAW files

Question

Hello. I use Dell XPS i7, RAM 32, SSD, and for several recent years my GPU was Nvidia GTX 1650. Which was fine but the Denoise AI implemented recently in ACR worked very slow, 20 Mp RAW files during ~2 min and 45 Mp files during 7-8 min. I purchased RTX 4060. It was recognized well by PS and ACR, and the denoise AI initially works quite fast, processing 20 Mp files during ~8 s, and 45 Mp files during 20-30 s. But this lasts for 2-3 images only, after that the speed drops to the previous 7-8 min. Neither PS nor ACR report any errors and show full recognition and support of the GPU. Restart of PS usually help for another couple of images but sometimes it starts slow from the very beginning. Where may be a problem? I do not process many RAW files together, only one-by-one, usually with several masks. I already returned the first purchased GPU and replaced it with another one, from a different manufacturer, but the results are the same.

ivank11134774 · Accepted Answer

Thanks. After many trys it certainly looks like a memory leak in ACR reported repeatedly by others but, surprisingly, present not in all systems:

https://community.adobe.com/t5/photoshop-ecosystem-discussions/ai-denoise-tool-in-camera-raw-causes-memory-leak/td-p/14133685#:~:text=The%20AI%20denoise%20function%20in,no%20longer%20open%20in%20Photoshop.

https://community.adobe.com/t5/photoshop-ecosystem-discussions/out-of-memory-message/m-p/14686801/highlight/true

Of note, I do have 3rd party plugins suggested in the quoted threads as potential source of memory leak but use them only rarely, and they have never caused any problems such as the ACR problem above.

ivank11134774 · Answer

Am not sure why somebody checked the box "user accepted solution" making the answer by @Erik Bloodaxe correct, it was not me, and the answer was actually not correct. Disabling the built-in Untel GPU in Windows Device Manager did not resolve the problem.

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