F.P.S. benchmarks on S.L.I. cards

Pimax 8K Series
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Are there any benchmark/ F.P.S. tests completed on newer model video cards in S.L.I. like 2 gtx1080 or 1070 or 970

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Yeah serious sam vr games. Why?

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I see, I will discuss with our team. thank you

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According to this article there is no support of Nvidia VRWorks in Serious Sam, only LiquidVR, which is its AMD counterpart

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All serious sam vr games work in sli. There was a very very good perf increase in the benchmarks I saw as well.

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This is more games developer issue than Pimax. Pimax just have to implement support for VRWorks or LiquidVR and will work only if game have implement it code as well. . This will be huge demand for 8KX especially.

This is verry impothant issue in future of VR in general. Imagine with LiquidVR CF support you can buy 2x RX580 for about 400$ and that will give you 30% better performance than single GTX1080ti in almost half of the price. With Eyetracking module and implemented Fovated rendering this performance could double for near same price. I didn’t mention Nvidia because they block SLI on same price range GTX1060 so in this price performance range Nvidia is not competitive. They start SLI support from 1070 model and that is diferent price range yes better performance but can’t compare with 1080ti because of diferent price.
Point of my comparison was not AMD vs Nvidia it is just amount of performance for same amount if dolars implementing just new already existing technology. So result is with new technology even with lower end GPU for for around 750$ you can double up your performance and that is huge diferent.

All this technology was able since DK2 time. Why is not implement earlier? It is not because Oculus found some standards and they didn’t implement it in Rift so it was pointless to develop game with it when you don’t have VR which will support it.
For 8KX implementation of such technology is must have. Pimax have to implement hardware support for it and work together with AMD/Nvidia on it. I think this will be mutual interest because they will finaly be able to show they GPU in full potential same as game developers will be easy with optimization of the games without cutting of much details.

That will be only way to play real 8K horizontal games on 8KX in full details.

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VRworks = VR SLI. As far as I know SLI doesn’t work in DX12. That version of DirectX migrated away from proprietary support (nvidia/amd) of multiple graphics card in favor of a general way of supporting multiple GPU’s. They call it “Multi GPU” and you can even mix AMD and Nvidia cards that way. Game engines do need to support it though, I don’t know which game/engines do support it at the moment …

EDIT at least 9 months ago unreal engine didnt support multiGPU: https://forums.unrealengine.com/development-discussion/rendering/107264-multi-gpu-support

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As of now, I don’t think there’s ANY engine at all that supports mgpu. I think “Ashes of singularity” is actually the only game out there that currently supports DX12’s “Multi GPU”. Although Vulkan API games CAN support, the game engine just needs to use it. Not sure which games currently do, if any at all

And then there’s of course still some DX11 sli/crossfire supported games like “serious sam”

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So resuming:

DX12 and Vulkan both support “Multi GPU”, which is the successor of “SLI” and “Crossfire”. This “multi gpu” mode is none specific to AMD or NVIDIA, you can even mix them. Game engines need to support it though, I’ve been googling and I only found “ashes of singularity” to support that at the moment. I don’t think Unity and Unreal engine support “multi gpu”.

CryEngine at some point was going to support “multi GPU” but I can’t even find it anymore in their roadmap or release notes, so I now doubt they will even support it… I dont know but it seems the future of multiple GPU gaming doesn’t look too bright.

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Here’s a screenshot that was posted in in June, where it says “DX12 multi GPU support” in v5.5

22065350146l.jpg749Ă—939 115 KB

However it’s now gone entirely from their roadmap !?! CRYENGINE | Roadmap That doesn’t look good at all …

EDIT I just asked on their forums if multiGPU support is still planned: what happened multi GPU support ? - CRYENGINE | Forum

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Thank you all for your information related the this question.

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Let us know if you get an answer :slight_smile:

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That is all our speculations based on tech specs we got right now publicly available.
Answers are not just from Pimax it is more general VR future and I’m just hoping with our descusion and raising few question we could help to push VR in right direction.

@Sjef do you agree m8?

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BTW @Sjef. That is what you are saying all true and I was more looking true DCS perspective. DCS is DX11 game so still depend on SLI/CF technology whic is not working at all in DCS. It was in the past but they screw up something and today there is no any or very minimum advantage to SLI/CF configuration.

This raise question in what direction will go game developing? In this DCS example maybe will be better to go on DX12 than to implement properly SLI/CF support especially for VR.

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It most probably will move into DX12. We just need to hope that game engine developers will start adding Multi GPU support to their engines. Problem is that it’s a lot of work and that the audience for it is rather small, so game engine studio’s might not want to devote developing time to it.

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Thanks to @heliosurge for bringing it up: unity and Unreal indeed support SLI for DX11, so that’s at least interesting !

Multi GPU support in DX12 seems still pretty non existent though, I think only “Ashes of Singularity” and the SteamVR performance test support it.

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Also this is pretty cool:

“VR SLI is automatically detected and enabled in VR projects. There is no way to manually enable or disable VR SLI in Unity since SLI configuration is controlled through NVIDIA Graphics driver control panel.”

So any Unity DX11 game that uses an engine after 2017.1.0 Beta 2 should have automatically SLI support, the developers can’t even turn it off :slight_smile:

EDIT the first official, non beta, Unity branch to support it is 2017.1 which was release 11 july 2017: Introducing Unity 2017 | Unity Blog So games based on that engine (or later) should have automatically SLI supported !

EDIT2

For DX11 Unreal Engine it seems a bit more complicated. It seems as of 4.12 NVIDIA has been maintaining VRWORKS enabled branches of the Unreal engine, but developers seem to struggle to even get it going. So I’m not sure how well Unreal engine based games support it, I guess some will but support doesn’t seem to be as good as Unity.

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