Nvidia and AMD in SLI?

[Bazilias]

Hello everybody,

 

I have a question.

 

On this link: http://nl.hardware.info/nieuws/45620/gtx-980-ti-en-r9-fury-x-getest-in-sli-met-directx-12

 

They say that with Direct X12 it's possible to run an AMD GPU with an Nvidia GPU in SLI.

 

My question is: Is It possible with every card? For example: AMD Radeon HD 6950 with and Nvidia GTX 670.

 

Does the chip matter in this particular situation?

 

 

Thanks in advance!

[Atmos]

Nvidia will not allow this, sorry, but this was kind of a thing in the past. Until nvidia decided to make their drivers commit suicide if they detected amd's drivers running in the background.

Thanks nvidia for being anti-competition. "It doesn't matter if you BOUGHT our cards. If you use their cards AT ALL, then you don't get WHAT WE HAVE." Jesus fucking christ, they act more like a child, than the multi billion dollar business they are.

 

 

I say kind of, because it was, and wasn't really. A lot of people, myself included used to run an AMD main card, and a cheaper nvidia card for dedicated physx calculations, until mid 2014 when nvidia rooted their drivers to kill themselves when they detect catalyst running, and to first and foremost disable ANY physx calculations.

[dragoon20005]

this is still up in the air as how it gonna work

 

nVidia have been bitching about allowing AMD cards to run inside the same system and locks down features like PhysX

 

also DX12 is only supported with newer GPUs like the Geforce GTX 9xx series and the AMD side based on the GCN 

 

the 6950 is not a GCN card

[Glenwing]

It's not possible. Be careful when you read articles saying "DX12 will make x, y, and z possible!". They don't mean you'll actually be able to do it. What they mean is, it might be possible for companies to make it possible. It doesn't mean they will, and in 95% of cases they won't.

[Bazilias]

But how did they manage to get those results?

 

As you can see the AMD Radeon HD 7970 is in SLI with Nvidia GTX 680.

And the R9 Fury X is in SLI with the GTX 980ti.

 

What did they actually do to get those two cards work together?

[SamwiseDB]

DirectX 12 support is currently only on the 900 series, also, even if you could run both in SLI, it depends how much VRAM you have in the 670, as there's a 2GB and 4GB model. The VRAM has to be the same in both cards for SLI to work. AMD Crossfire doesn't have this.

Correct me if I'm wrong.

[thenotoriousone]

Hello everybody,

 

I have a question.

 

On this link: http://nl.hardware.info/nieuws/45620/gtx-980-ti-en-r9-fury-x-getest-in-sli-met-directx-12

 

They say that with Direct X12 it's possible to run an AMD GPU with an Nvidia GPU in SLI.

 

My question is: Is It possible with every card? For example: AMD Radeon HD 6950 with and Nvidia GTX 670.

 

Does the chip matter in this particular situation?

 

 

Thanks in advance!

SLI is Nvidia's technology, CF is AMD's technology. Domkop.

[Bazilias]

SLI is Nvidia's technology, CF is AMD's technology. Domkop.

 

Haha dat weet ik. Maar ook al zei ik CF het is allebei onmogelijk in mijn optiek.

[thenotoriousone]

Haha dat weet ik. Maar ook al zei ik CF het is allebei onmogelijk in mijn optiek.

Misschien later wel mogelijk maar atm niet. 

[Nacho Marco Segui]

SLI is Nvidia's technology, CF is AMD's technology. Domkop.

Thanks Sherlock,but we already know that.The thing is that with dx12 nvidia and amd gpus can be used at the same time,although i don think that they will allow this in the future,now its possible to test it with Ashes of the Singularity and its beta.

[thenotoriousone]

Thanks Sherlock,but we already know that.The thing is that with dx12 nvidia and amd gpus can be used at the same time,although i don think that they will allow this in the future,now its possible to test it with Ashes of the Singularity and its beta.

No need to be a smartass, kid.

[Bazilias]

Thanks Sherlock,but we already know that.The thing is that with dx12 nvidia and amd gpus can be used at the same time,although i don think that they will allow this in the future,now its possible to test it with Ashes of the Singularity and its beta.

 

I stil don't get it how they pulled it off.

 

If Nvidia GPU's don't allow AMD GPU's to work together how is it possible to get those results?

 

For me it doesn't matter if it is in SLI or CF how did they managed to do it at all?

[Nacho Marco Segui]

I stil don't get it how they pulled it off.

 

If Nvidia GPU's don't allow AMD GPU's to work together how is it possible to get those results?

 

For me it doesn't matter if it is in SLI or CF how did they managed to do it at all?

http://www.anandtech.com/show/9740/directx-12-geforce-plus-radeon-mgpu-preview all the info is there,check it out

[Nacho Marco Segui]

No need to be a smartass, kid.

Why so salty? I only was trying to clarify that its possible to run both Nvidia and Amd at the same time

[SamwiseDB]

To me, it looks like the DX12 multi-display adapter doesn't use SLI or Crossfire. The technology is part of DX12, and therefore doesn't use SLI or CF drivers? Not sure how they pull it off, as GeForce and Radeon cards kill themselves if you run them in the same system at the same time.

Correct me if I'm wrong (I probably am).

[Bazilias]

To me, it looks like the DX12 multi-display adapter doesn't use SLI or Crossfire. The technology is part of DX12, and therefore doesn't use SLI or CF drivers? Not sure how they pull it off, as GeForce and Radeon cards kill themselves if you run them in the same system at the same time.

Correct me if I'm wrong (I probably am).

That's what I thought too.

 

But they clamed that it runs in SLI.

 

So how did they do it . I think that they could use some other technology or an 3th party program.

[siberiansteel11]

DirectX 12 support is currently only on the 900 series, also, even if you could run both in SLI, it depends how much VRAM you have in the 670, as there's a 2GB and 4GB model. The VRAM has to be the same in both cards for SLI to work. AMD Crossfire doesn't have this.

Correct me if I'm wrong.

I read a forum about dx12 it supports GTX 500 series above so I guess it doesn't support 900 series only not sure though 

[Bazilias]

I read a forum about dx12 it supports GTX 500 series above so I guess it doesn't support 900 series only not sure though 

If it doesn't support the 900 series how is it possible to run it with AMD?

[SPAS-ID]

one word : never

[Bazilias]

one word : never

So they basically lied about the SLI/CF configuration even when the results show the benchmarks?

[SamwiseDB]

I read a forum about dx12 it supports GTX 500 series above so I guess it doesn't support 900 series only not sure though

Sorry, the Wikipedia page is out of date. The 700 series is DX11, but the 600 series is DX12. Doesn't make much sense, but hey.

I was wrong.

But the 6950 isn't supported by DX12, so if you could buy a new AMD GPU, and they went ahead with this sketchy-sounding "Multi Display Adapter" then yes, you could.

[SamwiseDB]

That's what I thought too.

But they clamed that it runs in SLI.

So how did they do it . I think that they could use some other technology or an 3th party program.

It doesn't run in SLI, they probably used that as an analogy.

The "Multi Display Adapter" is like a Microsoft version of SLI. DX12 has the technology to let two competing (AMD and Nvidia) GPUs link, now all we have to do is get AMD and Nvidia to release new drivers that will let that happen.

Also, hopefully, we won't have the limitation of having to have the same amount of VRAM.

7870 and TITAN Z here we come!

[DXMember]

So they basically lied about the SLI/CF configuration even when the results show the benchmarks?

now they didn't read the anandtech article linked above

Un-Linked Explicit Multiadapter is here, it's real, for the first time it has been desmonstrated almost half a year ago

It does work, it will work

But you do need a modern GPU for that

Stariting nVidia Kepler (GTX 600 series)

and starting AMD GCN (HD 7000 series)

[Kinda Bottlenecked]

Sorry, the Wikipedia page is out of date. The 700 series is DX11, but the 600 series is DX12. Doesn't make much sense, but hey.

I was wrong.

But the 6950 isn't supported by DX12, so if you could buy a new AMD GPU, and they went ahead with this sketchy-sounding "Multi Display Adapter" then yes, you could.

 

All DX11 cards support DX12. And by that I mean you can play DX12 games even on the 6950. Though, those cards will support DX12 features to a certain level. Meaning some will lack native support for some DX12 features. Those features will either be emulated or not run on the card. As of today, there are no cards that have full DX12 support. Not even the GTX 900 series. 

[Norseman4]

[...] For me it doesn't matter if it is in SLI or CF how did they managed to do it at all?

The article title, and everywhere it may have mentioned that the cards were actually in SLI, is wrong.

 

This is the results of developers of Ashes of the Singularity adding Explicit-Multi-Adapter capabilities of DX12 into their work, the tables show the results.