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Multi-threaded Compositing

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When I assembly Panorama HDR in Photoshop in RAW, more like 20 files, display get black and computer get restart. I have Intel Core Ultra 7 265k, NVIDIA GeoForce RTX5050, 64 GB RAM. Is possible that mi help set off Multi-threaded Compositing??

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Eugene Tyson

Community Expert

Hi,

I'd be inclined to investigate the system restart before changing Photoshop's Multithreaded Compositing setting.

As @D Fosse mentioned, that setting doesn't control Camera Raw's GPU processing. If you're using Camera Raw to merge the HDR panorama, I'd look at Camera Raw's own GPU settings instead.

A few things worth checking:

Camera Raw GPU settings: Go to Edit > Preferences > Camera Raw > Performance. Try setting the Graphics Processor option to Custom and disabling Use GPU for Open and Save, if available. You can also temporarily disable GPU image processing to test whether it makes a difference. Be aware that some Camera Raw features require GPU support.
NVIDIA drivers: Check which driver version you're using. If you're using the Game Ready driver, consider trying NVIDIA's Studio driver, which is intended for creative applications.
(actually contacted NVIDIA for a different reason and they gave me a different driver to use for my issue - very helpful with their support).
Smaller batches: Try merging three to five RAW files instead of twenty. Does the problem occur with smaller panoramas, or only when processing larger batches?
Windows Reliability Monitor: This is particularly important. Search Windows for "View reliability history" and check what Windows recorded at the time of the restart. You can also check Event Viewer for corresponding system errors.

Photoshop crashing is one thing, but the entire computer restarting suggests a potentially deeper problem involving the graphics driver, power supply, thermals or system stability.

Your RTX 5050 has 8 GB of VRAM, which may be limiting with particularly large panoramas, but insufficient VRAM by itself shouldn't normally cause the entire computer to restart.

Could you also clarify:

Are you using Camera Raw's Merge to HDR Panorama feature or Photoshop's Photomerge?
What are the approximate dimensions of the individual RAW images?
Does Windows display a blue screen or error message, or does the computer simply go black and restart?

Those details would help determine whether we're dealing with a processing limitation, graphics driver issue or something more fundamental.

I'd avoid repeatedly attempting the full 20-image merge until the reason for the unexpected restart is clearer.

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drahom�r_1722Author

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Hi,
thang you for you answer. Tu your questions:
1. I assemble captures so way. I open Adobe Bridge where choose captures for assembling and open this caprures in Photoshop, because are in format RAW, he open Camera RAW and I start Panorama HDR.
2. Size of captures is perhaps 55 MB, from NIKON D850
3. Display make black and then computer mahe reboot without message about mistake.
In graphic NVIDIA GeoForce RTX5050 I have last driver Studio version 617.42 from 6th October 2026.
I tryed to changed a setting in GPU in Photoshop but without results.
This week I made comlitle uninstal Photoshop and Bridge and again this software instaled. I had in my computer old verzions unlegal Photoshop 2021 and 2024 one year ago and Adobe stoped me Photoshop, when I used version 2024 Adobe. It is my last trying. I have in my computer last drivers and BIOS all is from second halp of this year 2026.

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Eugene Tyson

Community Expert

Thanks for all the info.

I’d say changing the GPU settings in Photoshop is not going to make a difference.

From what I’m reading lately is that Camera Raw has its own graphics processor settings, so that's where I'd concentrate next.

You can check the Camera Raw's GPU settings in Adobe Bridge, go to

Edit > Camera Raw Preferences > Performance

Under Use Graphics Processor, select Custom and, if available, try disabling Use GPU for Open and Save

If it’s still not working then I’d have a go at disabling Use GPU for image processing see if that makes a difference

Found a bit of Adobe's guidance here:

https://helpx.adobe.com/camera-raw/desktop/troubleshoot/acr-gpu-faq.html

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Next I’d check what Windows records when the computer restrats

You’re entire system is rebooting without an error - I'd investigate Windows itself rather than continuing to reinstall Photoshop.

Press Windows + R, type perfmon /rel and press Enter.

This opens Reliability Monitor. Look for critical errors at the time the computer restarted.

You can also check Event Viewer > Windows Logs > System for errors around the same time, particularly Kernel-Power, BugCheck or WHEA-Logger entries.

If you find Kernel-Power Event ID 41 remember that it only indicates an unexpected shutdown. It doesn't identify what caused it.

So ...

Is this a desktop computer or laptop?

If it's a desktop, what power supply are you using?

Does the computer restart during other demanding tasks, or exclusively when merging HDR panoramas?

Have you tried merging just three or four D850 RAW files, and does that complete successfully?

For now, I'd avoid repeatedly attempting the full twenty-image merge until we've checked the Windows error reports.

Let us know what Reliability Monitor shows and whether changing Camera Raw's GPU settings makes any difference.

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D Fosse

Community Expert

Photoshop preference settings have no bearing on Camera Raw processing and functionality. So this will only impact any processing done in Photoshop after the file has left ACR.

RTX xx50 is on the low end in terms of ACR functionality. It will work, but you might see problems when pushing it with these huge panos. I would not attempt this with anything less than 16GB of VRAM.

Also make sure you have ample free disk space. Neither ACR nor the GPU use the Photoshop scratch disk. If available VRAM runs out (and it will), the GPU goes to the system pagefile. In theory it will borrow some shared system memory, but that may not be available, and this is all drawing on common system resources. The net result is that the whole system chokes, and the machine may crash or restart.

In short, what you describe requires a lot of system resources.

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CORCTON34033231

Community Expert

Hi, yes — you can turn it off in the Performance preferences:

1. Go to Edit > Preferences > Performance (Windows) or Photoshop > Preferences > Performance (macOS).

2. Deselect the Multithreaded Compositing checkbox.

3. Click OK.

Adobe's official guide is here: https://helpx.adobe.com/photoshop/desktop/get-started/settings-and-preferences/configure-photoshop-performance-preferences.html

Please let us know if the black screen / restart still happens after trying that, and your exact Photoshop version if so.

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Conrad_C

Community Expert

However I agree with the others that Multithreaded Compositing is extremely unlikely to help with this problem.

Multithreaded Compositing is a Photoshop setting affecting the compositing of layers in Photoshop. The Adobe help document you linked to says it…

…improves performance when working with documents containing multiple layers, especially when applying blending modes, opacity changes, or layer effects.

But the OP is having trouble assembling an HDR panorama in Camera Raw, which has an entirely different set of performance settings. If that Camera Raw HDR panorama is opened in Photoshop, it appears as a single layer, so Multithreaded Compositing acceleration of Photoshop layers should not make any difference.

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