Photoshop, Duel Graphics card Conflict.

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  • Updated 5 years ago
This issue is regarding how photshop reads multiple graphics cards. I need multiple displays for day to day work and currently have 4, 30" apple cinema displays plugged into dual Nvidia Geforce 8800 GT openGL enabled graphic cards with 512 Vram each. I understand there is a conflict with photoshop only being able use one. Due to this photoshop is only reading 327 available Vram out of the 512 and openGl is disabled and greyed out. Is there any way for photoshop to accept more than one graphics card or at least ignore one and take full advantage of the other instead of being confused of what card to read and thus disabling the opengl features???

This seem very silly or maybe I am just missing something. I am currently running Photoshop cs6 Extended and downloaded the trial for Photoshop CC but upon launch of PSCC All 3d and OpenGL features are disabled. I Can't afford to subscribe to CC until this issue is resolved, Can some one point me in the right directions or provide some sort of light at the end of the tunnel?

Paul

theorangeapple.ca
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Paul Lang

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Posted 5 years ago

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Chris Cox

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No, the available VRAM is per card, and reading 327 M means that something else on your system is consuming the VRAM (possibly the 30 inch display buffers).

Photoshop does use the primary GPU only, but can't if there isn't enough VRAM available.

But do try the 14.1.2 update, and check the Help->System Info log, or the output of the GPU Sniffer to see what is going on with your video cards.
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Paul Lang

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Say it is a lack of VRAM... Will new cards with more VRAM fix this or will there still be conflicts with having two cards installed? Also Photoshop CC requires 512mb of VRAM, so does that mean you should be buying a card that has a lot more if your system is using some of that VRAM? How can you tell how much VRAM the os requires?

Paul
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Chris Cox

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The only conflict with 2 cards is incompatibilities between drivers of different cards (especially different brands).

No, I can't easily tell how much VRAM the OS requires without hooking up the displays and then measuring it.

If you plan to use 3D features (or play games :-), get a card with 2 Gig or more of VRAM.
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Paul Lang

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Thanks for your insight. The two cards I have are identical but did some further digging and looks like my best option is a pricy single card with 4 display ports :(
Not a gamer this is strictly 3D, Photoshop and Aftereffects.