📎 AI Summary:
The thread discusses an issue where a Windows 7-based HP Z840 workstation with two GPUs—Quadro 4000 and Nvidia Titan X—only uses the GPU connected to the display for rendering, with no apparent way to leverage the second GPU for tasks. The original poster seeks advice on configuring the system to utilize the Titan X for rendering while the Quadro handles display, but responses suggest questions about the application support for GPU rendering and note that the Titan X's superior power makes it preferable for both display and rendering. Overall, the conversation indicates that the user’s system setup may not easily support dedicated GPU rendering without specific software or configuration changes.
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RyanIG

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Thread Author #1
I've posted this across a few forums, hoping one might shed some light on the issue.

I have a HPZ840 workstation running Windows 7 with two GPUs installed.

- Quadro 4000 - for Display
- Nvidia Titan X - for rendering
- There's no onboard graphics

The issue is, the computer will only use the GPU that has connections going to it.

If I have a DisplayPort and DVI cable going into the Quadro, the system will render with the Quadro, the Nvidia card isn't utilised at all.

The latest drivers are installed and I tried setting a primary GPU in the BIOS but it defaults to whatever card has connections running to it.


**Here are some heaven benchmark results.**

This is with the DVI and Display port cables attached to the Titan X:
[1]: Link Removed

This is with the DVI and DisplayPort cables attached to the Quadro:
[2]: https://i.stack.imgur.com/V9ZxF.png

Two very noticeable differences.

When in Nvidia Control Panel, it doesn't give me the option to select a GPU to use:
[4]: https://i.stack.imgur.com/NmVNq.png

But Windows notices the cards in Device Manager.

Has anyone experienced anything like this before?

My end goal is to have the Quadro 4000 card only used for display, and the intense rendering tasks to be picked up by the Titan X card.

Is there a certain way I need to setup the cards or a setting I need to change?

If there is any additional information required let me know and I will provide it.

Thanks
 

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Neemobeer

Neemobeer

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#2
What application are you using, does it support GPU rendering?
 

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kemical

kemical

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#3
To be honest the Titan X is so powerful there's no need for an extra card really unless it's something specific your doing.

I know that some lappies use software to switch between gpu's when going from 2D to 3D but I've not heard of a downloadable application which would do the same.
 

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trstick1

trstick1

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#4
Why are you using the Quadro 4000 for display? Quadro has only 256 cores. The Titan X is much more powerful with 3,584 cores. You are better off using the Titan X for both display and rendering.

Sent from my GT-P5210 using Windows Forums mobile app
 

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