Possible 100% scaling with dual GPU?

[Mr.Meerkat]

So AMD has created a blog today show casing how in Deus Ex and DX12, you can get "up to" 100% scaling.

Quote

Up to 100% faster performance using Radeon Software Crimson Edition (RSCE) driver 16.10.2 running Deus Ex: Mankind Divided DirectX®12 on 8GB Radeon RX 480 multi-GPU than with 8GB Radeon RX 480 single-GPU.

Personally I find this quite interesting as AMD continues to push multiple GPUs solutions while Nvidia has basically given up on it with the dropped support of SLI in their xx60 cards and limited to dual GPUs support on their xx70 and 80 (and titan) cards.

 

We should probably take a massive grain of salt but at least they aren't lying with the 35FPS result with the RX480 .

Proof:

Spoiler

Source: http://radeon.com/en-us/deus-ex-directx-12-mgpu/?sf40634085=1 &  https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided (watch the video, shows 100% scaling at 1440p like AMD states)

 

[SpaceGhostC2C]

While it's probably impossible to completely do away with the overhead of using multiple GPUs, I guess it's possible to reach the ideal scenario in which the actual scaling is close enough to 100% to be within the margin of error of these measurements. My understanding is that GPUs and their dirvers can't by themselves grant this, meaning the exact scaling you get will depend on the particular game you play. I wouldn't be surprised if Deus Ex works abnormally well with Crossfire.

 

And though the claim is for their latest cards, I never really benchmarked my dual GPU setup to see how well it scales, I only cared about being able to crank this or that setting up and get consistent 60FPS without added problems. Maybe I should, just to see in which range it lies.

[elkenrod]

Show me that performance in some quality titles and then we can start talking.

[The Benjamins]

Here is PCPer article

https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided

 

They got 55 for 1 and 87 for 2 of them at 1080p Very High

 

In the video they show the same results as AMD 100% scaling at 1440p on Very High

[zMeul]

100% GTFO! https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided?utm_source=dlvr.it&utm_medium=twitter

[Zyndo]

12 minutes ago, Mr.Meerkat said:

Snip

DX12 and Vulkan are designed to have much better multi GPU support, so I certainly believe you can get near 100% scaling in the right situations/games. and Nvidia hasn't given up on SLI... they just took out SLI on their lower end cards so that people wouldn't try SLI with lower end cards because its a waste of money (same with 3-way and 4-way SLI, waste of money). Also newer API's and technologies allow for the MDA/LDA setups which will phase out traditional SLI and Crossfire, so if you're interpreting recent events that Nvidia is giving up on SLI, that is because there is also something better coming along which will replace it as it is.

[Mr.Meerkat]

7 minutes ago, SpaceGhostC2C said:

While it's probably impossible to completely do away with the overhead of using multiple GPUs, I guess it's possible to reach the ideal scenario in which the actual scaling is close enough to 100% to be within the margin of error of these measurements. My understanding is that GPUs and their dirvers can't by themselves grant this, meaning the exact scaling you get will depend on the particular game you play. I wouldn't be surprised if Deus Ex works abnormally well with Crossfire.

 

And though the claim is for their latest cards, I never really benchmarked my dual GPU setup to see how well it scales, I only cared about being able to crank this or that setting up and get consistent 60FPS without added problems. Maybe I should, just to see in which range it lies.

AMD's CFX has had better scaling than Nvidia's SLI recently so...meh? 

Maybe DX12 really can grant 98%+ scaling (AMD's already had 95% scaling in some DX11 titles) which in that case, it actually makes a bit more sense to go dual GPU  

 

6 minutes ago, elkenrod said:

Show me that performance in some quality titles and then we can start talking.

Hold on for a few months then  

We need more games that are full DX12 (and Deus Ex isn't really fully DX12 anyway )

 

2 minutes ago, zMeul said:

100% GTFO! https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided?utm_source=dlvr.it&utm_medium=twitter

Yah, maybe but maybe it's something to do with it being tested at 1080p (with better scaling at 1440p? Has happened before...)

 

Just now, Zyndo said:

Snip

Hehehe, pcper's tests show zero improvements with dual 1060s  

[The Benjamins]

3 minutes ago, zMeul said:

100% GTFO! https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided?utm_source=dlvr.it&utm_medium=twitter

If you would look at their video you will see it scales 100% at 1440p but not at 1080p. and AMD article states that.

[VerticalDiscussions]

So, thats a good thing. They deserve a red star now.

[SpaceGhostC2C]

7 minutes ago, Mr.Meerkat said:

AMD's CFX has had better scaling than Nvidia's SLI recently so...meh? 

Maybe DX12 really can grant 98%+ scaling (AMD's already had 95% scaling in some DX11 titles) which in that case, it actually makes a bit more sense to go dual GPU  

I'm not sure why you mention SLI, as I also have AMD cards, just 280+7950 instead of the latest. But I'm just curious what the scaling is with the latest driver, or with any driver really, because I've never measured it  

[The Benjamins]

a 480 gets 20 FPS at 2160p and a 1080 gets 29 while the Titan XP gets 40. so if it can scale 100% again 2 480's would be faster then a single 1080 or on par to a Titan XP.

 

http://www.guru3d.com/articles-pages/deus-ex-mankind-divided-pc-graphics-performance-benchmark-review,9.html

[Jovidah]

Considering the horrendously poor performance / optimization of single cards in that game... it's probably entirely surprising. Whereas in most games a 2nd GPU only runs at 50%, in this game even the first GPU only runs at 50%! 

 

Also, I think the 1060 not having SLI isn't because nVidia gave up on SLI, rather I think it's to prevent 1060 SLI combos from cannibalizing potential 1070, 1080 and future generation sales.

[zMeul]

4 minutes ago, Jovidah said:

Also, I think the 1060 not having SLI isn't because nVidia gave up on SLI, rather I think it's to prevent 1060 SLI combos from cannibalizing potential 1070, 1080 and future generation sales.

mGPUs in DX12 do not work in SLI/CFX, they work in explicit multi-adapter

nVidia should release some drivers for the DX12 mGPU scaling

[Mr.Meerkat]

2 minutes ago, SpaceGhostC2C said:

I'm not sure why you mention SLI, as I also have AMD cards, just 280+7950 instead of the latest. But I'm just curious what the scaling is with the latest driver, or with any driver really, because I've never measured it  

Well I can't remember who did an article on it a few months back and it showed that in Dual GPU support games, AMD generally had better scaling than Nvidia did   (don't worry, even back in 2014 AMD got some games to scale at 95%~ ).

 

Just now, The Benjamins said:

a 480 gets 20 FPS at 2160p and a 1080 gets 29 while the Titan XP gets 40. so if it can scale 100% again 2 480's would be faster then a single 1080 or on par to a Titan XP.

 

http://www.guru3d.com/articles-pages/deus-ex-mankind-divided-pc-graphics-performance-benchmark-review,9.html

Yah, and if gloflo can manufacture the polaris 10 wafers to a higher quality then...maybe we can see 95watts RX480 in general  (the "mobile" RX480 is rated at 95watts while being a full phat P10 like the desktop 480 and their embedded polaris 10's also being rated at 95watts)

Maybe AMD can finally live up to their promise of 1080 performance while consuming less power  

[lightningterror]

This also helps as well.

 

[Jovidah]

3 minutes ago, huilun02 said:

I'd imagine nGreedia would rather force their customers into buying a high end card and find an excuse to not allow cross vendor multi-gpu potential in Dx12. 

Honestly, mixing different brands graphics cards sounds like a compatibility / driver nightmare to me. Good luck trying to optimize  that.

 

Actually what I would be most interested in is somehow unlocking the ability to use the iGPU on the CPU in tandem with the graphics card. Right now the iGPU is seen mostly seen as a useless afterthought by most gamers, but that would be a gamechanger.

[patrickjp93]

2 hours ago, Jovidah said:

Honestly, mixing different brands graphics cards sounds like a compatibility / driver nightmare to me. Good luck trying to optimize  that.

 

Actually what I would be most interested in is somehow unlocking the ability to use the iGPU on the CPU in tandem with the graphics card. Right now the iGPU is seen mostly seen as a useless afterthought by most gamers, but that would be a gamechanger.

When the PCIe bus can support that much communication between the iGPU and dGPUs, it will be worth it.

[ApolloFury]

10 hours ago, zMeul said:

100% GTFO! https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided?utm_source=dlvr.it&utm_medium=twitter

 

[RagnarokDel]

10 hours ago, elkenrod said:

Show me that performance in some quality titles and then we can start talking.

Deus Ex Mankind Divided isnt?

[zMeul]

6 minutes ago, ApolloFury said:

 

“Believe only half of what you see and nothing that you hear."

 

I really like for someone to explain how 102% mGPU scaling is actually possible

[bbqsauce]

43 minutes ago, zMeul said:

“Believe only half of what you see and nothing that you hear."

 

I really like for someone to explain how 102% mGPU scaling is actually possible

margin of error

[zMeul]

Just now, bbqsauce said:

margin of error

margin of error?!

if you like to talk margin of +/- error, then the difference could be greater than 102%

[Sintezza]

It mainly depends on the games and resolution you play at.

at 4K you should basicly see a pretty good scaling in games that are good optimized to work with crossfire or sli alike.

But if you play at lower res like 1440p then it realy depends from game to game.

Gpu demending games should be able to show a pretty nice scaling.

But there are also games in which the scaling will be garbage regardless of whatever api is used.

[Prysin]

15 hours ago, zMeul said:

100% GTFO! https://www.pcper.com/news/Graphics-Cards/DX12-Multi-GPU-scaling-and-running-Deus-Ex-Mankind-Divided?utm_source=dlvr.it&utm_medium=twitter

@LinusTech @Slick @Whaler_99

Can we have a "Misinformation" tag/upvote ??
Shit like what the poster above posted, which is taken out of context only to tarnish a brand due to personal vendetta is not helpful to other community members. Be it old or new.

 

@The Benjamins already showed and prooved that @zMeul was wrong. Yet the above poster keeps tarnishing this thread with his personal hatred.

[Bouzoo]

38 minutes ago, Prysin said:

@LinusTech @Slick @Whaler_99

Can we have a "Misinformation" tag/upvote ??
Shit like what the poster above posted, which is taken out of context only to tarnish a brand due to personal vendetta is not helpful to other community members. Be it old or new.

 

@The Benjamins already showed and prooved that @zMeul was wrong. Yet the above poster keeps tarnishing this thread with his personal hatred.

That is a form of downvoting and I'm pretty sure it would be heavily missused. 

That and people thinking they are right branding the real corrct answers as wrong.