Quadro P4000 in SLI (with Mosaic, 6 displays)

Hi, I know this post is in regards of a Quadro card. However, I wasn’t able to find any Quadro forums, so sorry if this clutters up the forums slightly!

I bought 2 Quadro P4000’s to use in a large 6-screen TV (monitor?) wall, in which I would like to utilize the NVidia Mosaic technology to help me.

According to this site: http://on-demand.gputechconf.com/siggraph/2016/presentation/sig1603-doug-traill-large-display-walls-designworks-api-tools.pdf

I will require either an HB or a single SLI bridge to operate Mosaic. It also states that 2 Quadro GPU’s under a 2-way SLI would be able to achieve 8 displays maximum. (Will a Single SLI Bridge have any limitations [big ones] compared to the HBR bridge?)

So far, this makes sense to me (requiring a physical connection between the two cards). However, I searched up different forums, and many of them said that using SLI would disable the Video Ports on the secondary card. This really confuses me, as I am using an SLI bridge to operate 8 displays in Mosaic, even though SLI doesn’t really allow you to use the Video Ports of the secondary GPU.

How is this supposed to work?

Are we just using the SLI Bridge as a Quadro Sync II alternative? As in, SLI is still disabled, but we use the bridge so that multi-GPU Mosaic can be utilized.

(I originally posted this in the GeForce Forums before they told me to move over here)

Quadro is a professional graphics card. Questions about Quadro that have nothing to do with CUDA probably should go in one of the forums dedicated to professional graphics:


The SLI bridge allows the two GPUs to communicate. Enabling SLI puts the GPUs in a mode where they are rendering the same output to the same logical framebuffer. The two are not identical.

In a 2-way mosaic setup, a single SLI bridge should be sufficient - compared to the HB bridge. If you actually wanted to run SLI, then the HB bridge is recommended.

The bridge here is allowing for synchronization between the two GPUs, so that you don’t see tearing or artifacts between displays in a mosaic/wall setup. It is not a complete replacement for Quadro Sync, since Quadro Sync also allows you to extend this notion beyond 2 GPUs, and also affords the possibility of running against a house (external) sync source.

Thank you so much for clearing up my confusion, I get it now! Sorry I posted it in the wrong forums, my bad.