Does P3D v5 Support SLI

[bnash00]

Hi quick question,

Does P3D v5 Support SLI? I have two Titan X's in SLI configuration. I can't seem to get SLI working. I assume not, thought I would ask.

Thank You

[glapira4]

Hi Guys,

same here... I have 2x2080ti and I don-t seem to be getting any usage on the second card.

Any idea? Is SLI supported?

Thanks a lot.

[Beau Hollis]

In D3D12 SLI is called Linked Node Multi-Adapter, and it's a core part of the API, rather than being a driver feature. We do not utilize it yet, but we do plan to add support in a future point release. Our new rendering engine is already built with basic support for linked node adapters, but they are not used because we still need to implement something like alternate frame rendering (AFR) in our engine in order to get performance gains. We used driver-based AFR in v4. The good news is that, when we do add this, we expect scaling to be much better than v4 because we have direct control over how it works.

If you plan to use 2 views on two displays, I suggest disabling SLI. We have seen very good performance scaling in this configuration. To test it out:
- Disable SLI
- Plug one monitor into each GPU
- Enable the Auto-fill desktop view group

Thanks

[bnash00]

Thank you for the reply Beau. I just wanted to congratulate you and the other developers on P3D v5. The performance gains are a dream come true. You guys did an outstanding job with this release.

Thank you

[JuriA340]

In D3D12 SLI is called Linked Node Multi-Adapter, and it's a core part of the API, rather than being a driver feature. We do not utilize it yet, but we do plan to add support in a future point release. Our new rendering engine is already built with basic support for linked node adapters, but they are not used because we still need to implement something like alternate frame rendering (AFR) in our engine in order to get performance gains. We used driver-based AFR in v4. The good news is that, when we do add this, we expect scaling to be much better than v4 because we have direct control over how it works.

If you plan to use 2 views on two displays, I suggest disabling SLI. We have seen very good performance scaling in this configuration. To test it out:
- Disable SLI
- Plug one monitor into each GPU
- Enable the Auto-fill desktop view group

Thanks

Does this include possible VRAM sharing/pooling across card? There seems to be some confusion on the matter, if RTX Cards (2070S, 2080S, 2080 Ti) are able to double your VRAM in NVLink.

[danosti]

Hi Beau,
I have a question regarding 3 monitors with 2 GTX 1080ti cards .
What would be the the best plug in configuration and setup in windows and P3d for
3 monitors .
Cheers DANIEL

[WrongWay]

In D3D12 SLI is called Linked Node Multi-Adapter, and it's a core part of the API, rather than being a driver feature. We do not utilize it yet, but we do plan to add support in a future point release.

Can you please provide an update on this? Has this been implemented yet? Or has a time frame for implementation been adopted yet?

With the shortage of new graphics card at present, this is more and more becoming a really attractive feature, if we can purchase an older card to pair with our current card.

Thanks.

[Beau Hollis]

WrongWay,
This has not been implemented yet. It's still something we plan to do, but I can't provide any specifics on a time frame.

DANIEL,
I usually put two monitors on one GPU and one on the other. If you're a VR user, make note of which GPU your HMD is connected to. Your main app window will need to be on a monitor connected to that GPU for VR to work properly.

JuriA340,
Will VRAM be doubled? That's a bit nuanced, but the simple answer is not for our use case. Even on newer GPUS, the best practice for alternate frame rendering is still to keep separate copies on each GPU and explicitly copy any inter-frame-dependent data. I believe there are some Compute/AI use cases where the benefits of working with a large dataset do outweigh the performance costs of streaming data between GPUs on-demand.

[ldallara]

Hi, are there news on SLI support? If it is not yet available, can you know more or less when it is implemented?

[mafeistswiss]

Hello together,

any news on that topic?
We have a 3x Full HD beamer setup with intels latest generation of processing, Nvidea's 3080 and fast (enough) RAM. Graphic Card and Processor on 80-100% Load.

Alternatively, more PC's running the system?

Thanks
Martin

[Beau Hollis]

Sorry. I don't have any new information to share regarding SLI.