AMD's information on DX12 and new rendering technique for multi-gpu

[ahhming]

With directX 12, you’ll be able to offload minor compute tasks to the integrated GPU, or APU. This is helpful since native support means that GPUs aside from the ones specified in AMD’s drivers will be able to use Dual Graphics technology allowing the discrete graphics card and APUs to work in harmony. It’s able to increase framerates by a not insignificant amount.



New to DirectX 12, is a split-frame rendering mode where each GPU is tasked with rendering half of the frame. This can significantly reduce frame-time, increase responsiveness and is a far more efficient use of multiple GPU’s.The overhead will be reduced and the stuttering should theoretically be all but erased.
 


In directX , the memory pool can be shared across all GPU’s, so that if the frame being rendered by one is particularly memory hungry then it can access the RAM of the other cards if necessary. While we’ve seen GPU RAM usage spike with recent games, now all the assets will be put in the shared pool, accessible by any GPU available, even integrated solutions.
 

DirectX 12 games ,Deus Ex: Mankind Divided and Ashes of the Singularity are two games that are currently being developed solely with DirectX 12 in mind. Deus Ex: Makind Divided will also use AMD’s new TressFX 3.0. All of this means that they’ll likely look good and include complex gameplay without a huge performance penalty.
 

Source:
http://wccftech.com/amd-sheds-more-light-on-explicit-multiadapter-in-directx-12-in-new-slides/

 

http://www.overclock3d.net/articles/gpu_displays/deus_ex_mankind_divided_confirmed_to_support_directx_12_and_tressfx_3_0/1
 
 
Edit:

seems similar to their old technology

[Altecice]

Seems as if the new Split-frames method will cause screen tearing no?

[ahhming]

Seems as if the new Split-frames method will cause screen tearing no?

possibly, though it will be much easier on each gpu as the effective resolution is halfed

[Briggsy]

excellent.

 

 

[SkilledRebuilds]

Sigh... If the past is anything to go by...problem being the Developer dependency... cos they can doesn't mean they will.

Have high hopes, but don't we all...

[itachipirate]

WAN SHOW PLS

 

I want to hear Linus talk about DX12 more, I wonder if he thinks it'll live up to the hype

[werto165]

Seems like the split frame rendering is a bit misleading, I'm sure it would just take parts of the frame not really splitting it into two per se. So one focuses on the lighting of the scene another focuses on the meshes. EDIT: apparently it is split into two, oh well.

[DeViLzzz]

Does AMD have an answer to what Nvidia does with PhysX though with their new line of cards?  Nothing I have seen says so and thus I will stick with Green Team.

[werto165]

Does AMD have an answer to what Nvidia does with PhysX though with their new line of cards?  Nothing I have seen says so and thus I will stick with Green Team.

See what the new tress fx brings, hopefully more than just hair, if it is hair at least something that runs better than hairworks. I'm sure it will run well on both AMD and nvidia hardware. I'm just hoping we can mix and match GPU's with DX-12 but nvidia will probably try and nuke that idea.

[SkilledRebuilds]

They need to expand past TressFX and have an actual PhysX alternative, or just license it from Nvidia..

 

AMD will lose customers now that Project cars (the one game I've been waiting for exclusively) & various other past & present titles pretty much requires a Geforce card to ensure TOP (not AVG) performance that we expected from our TOP tier single AMD GPU's.

 

I already plan to move into Greener pastures unless AMD can provide some insight into their future plans.

[Arreat]

All seems very promissing . 

 

I wonder how will this split rendering work without tearing (considering it should also work without vsync) , probably the gpu's will have to be synced atleast to eachother in dirver . 

Also the double frame buffer seems missleading , this will absolutely increase the memory , but not two times . You will always have textures that repeat on both "sides" that will need to be loaded in both GPU's , how much memory you get will actually depend on the game , scene , and size of assets . Still interesting though , some more memory is better than what we have now . 

 

About the dev support , I'm not worried in the least , So many big engines , and big studios are working on implementing DX12 , and talking about near future games that will use it , that we will probably see the fastest DX adoption ever .

[Kyuubixchidori]

Keep in mind this is not a amd only thing. soon sli 970 users can get 7 gigs of ram!

 

Honestly very excited. hopes this means more flexibility in general. how cool would it be if your integrated graphics could help out? giving a 5-10 fps boost?

[Notional]

They need to expand past TressFX and have an actual PhysX alternative, or just license it from Nvidia..

 

AMD will lose customers now that Project cars (the one game I've been waiting for exclusively) & various other past & present titles pretty much requires a Geforce card to ensure TOP (not AVG) performance that we expected from our TOP tier single AMD GPU's.

 

I already plan to move into Greener pastures unless AMD can provide some insight into their future plans.

 

Are you talking about the physics engine, or the APEX physics based graphical effects?

 

GameWorks is anti competitive, and it saddens me to see consumers actively supporting NVidia for it.

[SkilledRebuilds]

Are you talking about the physics engine, or the APEX physics based graphical effects?

 

GameWorks is anti competitive, and it saddens me to see consumers actively supporting NVidia for it.

APEX physics, the ones run on the CPU crippling AMD ecosystems.

Im all against anti-competative measures, but I've been waiting for AMD for years to have an alternative PhysX (APEX type) (TressFX is not the same obviously) and while its not good to buy based off a single feature, the one game I wanna play out of them all,..Project Cars, uses it and I want full performance.

[KeltonDSMer]

SFR was implemented in the Mantle render path for Civ: BE a while back.

 

Here is an article from AT: http://www.anandtech.com/show/8643/civilization-beyond-earth-crossfire-with-mantle-sfr-not-actually-broken

 

They seemed to think SFR was superior to using dx11 crossfire's AFR implementation. Lower averages, but vastly higher minimums and very nice frame time consistency. They claimed SFR through Mantle made for a much smother gaming experience compared to the dx11 path.

[AxelRantila]

SFR just screams screen tearing from far far away

[dragosudeki]

snip

I dislike the idea of having these companies do their own versions. Realistically speaking, only one will actually be used in each game. I'd actually like to see a separate company emerge that focuses on these kind of physics things or at least see some engines incorporate their own. Perhaps then it can actually work efficiently and properly. Though, I doubt any of this will occur. Wish the game industry would just push itself. Graphical advancements are the only things that are ever focused on... I think we need more interesting game mechanics/features that don't completely involve graphical enhancements. Maybe that is just me waiting for a proper parkour system to be a necessity in almost every action/fps game. sorta like what Brink did

[Vebb]

I found this video on how to install DX12: https://www.youtube.com/watch?v=pHFJsLK-gRc

[Humbug]

Seems good. I only have 1 question.

What is the TDP of the cards.! Really want to see if they will run hotter than the 290/Xs or cooler.

?

This is about directX 12 in general. Not any particular AMD GPU. Most of this is applicable to Nvidia too...

 

[Virgule]

Edit:

seems similar to their old technology

0:51...scissoring.....nice!

[ahhming]

0:51...scissoring.....nice!

5:33 phyx confirmed!

[amorphous714]

The split frame rendering should not cause tearing if it works the way I think it does.

 

The GPU's work together with the same data, yes? Then the two halves should not be rendering two different viewpoints that would cause tearing, nor should it be pushing out two halves of a frame independently causing weird tearing on the monitor side of things. The GPU's should be rendering the two halves using the same data and combining it into one frame that it pushes out to the monitor essentially only combining the GPU power while sharing the same memory.

 

The only way I see this causing tearing is if the GPU's are not synced with each other and each is pulling data independent of each other, which should not happen if it is using pooled memory.

[CommandMan7]

possibly, though it will be much easier on each gpu as the effective resolution is halfed

You got me thinking, does that mean that if you take two older cards that don't support 4K, like the GTX 500 series or AMD's low end HD 7000 series, then will they be able to render their separate halves and therefore do 4K? Although using 5 year old cards for 4K isn't that good of an idea...

[ICantThinkOfAnyGoodName]

You got me thinking, does that mean that if you take two older cards that don't support 4K, like the GTX 500 series or AMD's low end HD 7000 series, then will they be able to render their separate halves and therefore do 4K? Although using 5 year old cards for 4K isn't that good of an idea...

I don't think they even have connectors that support 4k. Not sure about that though.

[CommandMan7]

I don't think they even have connectors that support 4k. Not sure about that though.

 

Well it doesn't matter anyways, because I just realized cards that old won't run DirectX 12. Derp.