AMD's Raja Koduri and RX 480 Multi-GPU - 100% Scaling On Sniper Elite 4

[Raevenlord]

At GDC's AMD Capsaicin Event, AMD's Raja Koduri reaffirmed Radeon's commitment to Multi-GPU setups by remembering his RX 480 launch event claim on a RX 480 dual setup beating their competition's high-end solutions. Then, Rebellion's Chris Kingsley took stage, who attributed the fact that his team was able to get Sniper Elite 4 to run with 100% scaling on a RX 480 dual GPU setup to Rebellion's previous work with Mantle. Next to it, for perspective, AMD showed a dual-GPU RX 480 system running the same game and settings at virtually double the frame rate - a perfect, 100% scaling. Rebellion's Chris Kingsley also elaborated on the importance of DX 12 and Vulkan on making such a thing even possible in the first place, reiterating the software and coding investment necessary to make that happen.




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[Camm]

I wonder what this scaling is like on Nvidia GPU's and if this is a specific multicard render path?

The interesting thing is, because of how the PS4 Pro is setup with its dual GPU's, these sort of implementations are going to become more common, and likely faster on AMD hardware.

 

[champsilva]

I never understand why AMD always show sky when they want to show improvement performance

This is so invalid for me, we need at least a fixed spot

 

[FordGT90Concept]

The problem is that this level of performance requires serious optimization that developers can't be expected to do unless hardware vendors pad their pockets.

TL;DR: Exception, not the norm.

 

[TheLaughingMan]

I wonder what this scaling is like on Nvidia GPU's and if this is a specific multicard render path?

The interesting thing is, because of how the PS4 Pro is setup with its dual GPU's, these sort of implementations are going to become more common, and likely faster on AMD hardware.

As far as I recall, PS4 Pro does not have a dual GPU. It has one GPU with "double the power" of the original and an overclocked mode. When you are playing a Pro title, it switches to a higher clock speed and overclocks the CPU as well. It does not enable a secondary GPU.

 

[efikkan]

Seriously? It doesn't matter if 2× RX 480 "matches" GTX 1080 in a small selection of games. "No one" is stupid enough to buy that.

 

[the54thvoid]

The problem is that this level of performance requires serious optimization that developers can't be expected to do unless hardware vendors pad their pockets.

TL;DR: Exception, not the norm.

Absolutely the message. Smoke and mirrors.

 

[Camm]

As far as I recall, PS4 Pro does not have a dual GPU. It has one GPU with "double the power" of the original and an overclocked mode. When you are playing a Pro title, it switches to a higher clock speed and overclocks the CPU as well. It does not enable a secondary GPU.

"“We doubled the GPU size by essentially placing it next to a mirrored version of itself, sort of like the wings of a butterfly,” - that's a quote from Mark Cerny. No one knows, but we do know that stock PS4 games have their compatibility maintained by simply 'turning off' one half of the GPU.

These two things combined sounds awfully like two discrete GPU's. Shrug.

 

[TheLaughingMan]

"“We doubled the GPU size by essentially placing it next to a mirrored version of itself, sort of like the wings of a butterfly,” - that's a quote from Mark Cerny. No one knows, but we do know that stock PS4 games have their compatibility maintained by simply 'turning off' one half of the GPU.

These two things combined sounds awfully like two discrete GPU's. Shrug.

http://stadt-bremerhaven.de/wp-content/uploads/2016/11/PS4-Pro-Teardown-4.jpg

Where? Its an APU from AMD. That is a know fact. So that is discrete is out the window. There is also no secondary chip on the PCB. I don't recall the size of the chip changing so I am going to just go with whoever Mark Cerny is is either a liar or talk out his a$$.

I don't console, but I am sure the truth is somewhere in the middle here like they doubled the compute cores or something on the iGPU in the system. And Mark was just talking non-sense trying to explain what another company he had nothing to do with was building for them.

 

[FordGT90Concept]

It would be part of the APU. The size didn't change much because of the 14nm die shrink. The die shrink is the only reason why PS4 Pro and XB Scorpio are economically feasible.

 

[mroofie]

I never understand why AMD always show sky when they want to show improvement performance

This is so invalid for me, we need at least a fixed spot

Lmao kinda invalidates the whole exercise

 

[Camm]

http://stadt-bremerhaven.de/wp-content/uploads/2016/11/PS4-Pro-Teardown-4.jpg

Where? Its an APU from AMD. That is a know fact. So that is discrete is out the window. There is also no secondary chip on the PCB. I don't recall the size of the chip changing so I am going to just go with whoever Mark Cerny is is either a liar or talk out his a$$.

I don't console, but I am sure the truth is somewhere in the middle here like they doubled the compute cores or something on the iGPU in the system. And Mark was just talking non-sense trying to explain what another company he had nothing to do with was building for them.

I perhaps used the word discrete without clarifying, with what I was implying that it is two separate GPU cores on die. This isn't exactly crazy as apparently the CPU parts are literally two four core modules on on a single package. Ultimately, all an APU is is a single die package (AMD's dreams of more fully integrating together GPU+CPU hasn't seemed to have happened).

 

[AsRock]

I never understand why AMD always show sky when they want to show improvement performance

This is so invalid for me, we need at least a fixed spot

Yeah i see it completely invalid too, if there was more sky in the pic for the single card chances are it be a good deal higher.

They should save the game and load it up for each test and then see what the differences are.

 

[cotes42]

I still really want to see crossfire support for Doom. But I think I've read Vulken doesn't support crossfire?Anyone with a link? Thanks!

 

[kn00tcn]

"“We doubled the GPU size by essentially placing it next to a mirrored version of itself, sort of like the wings of a butterfly,” - that's a quote from Mark Cerny. No one knows, but we do know that stock PS4 games have their compatibility maintained by simply 'turning off' one half of the GPU.

These two things combined sounds awfully like two discrete GPU's. Shrug.

Where? Its an APU from AMD. That is a know fact. So that is discrete is out the window. There is also no secondary chip on the PCB. I don't recall the size of the chip changing so I am going to just go with whoever Mark Cerny is is either a liar or talk out his a$$.

mark has to dumb things down in interviews all the time, if he was like that in reality, there's no way the ps4 would have been designed properly

intel's first quadcores were 2 duals 'stitched' together, i'm not sure if they shared some other parts of the logic, but that's likely what ps4 pro has... FINALLY, i've been wondering why we dont have high end gpus like this, we only sometimes see a midrange or lower end gpu that has exactly half specs of the high end one

the heatspreader doesnt show the die of course, different cpus change shape, but the socket size & spreader are the same, we only normally see exposed dies & their real sizes on laptops & gpus

I never understand why AMD always show sky when they want to show improvement performance

This is so invalid for me, we need at least a fixed spot

Yeah i see it completely invalid too, if there was more sky in the pic for the single card chances are it be a good deal higher.

They should save the game and load it up for each test and then see what the differences are.

i didnt watch the stream, but are you two basing an entire argument from a screenshot of a video where the game movement is changing at all times!?

I still really want to see crossfire support for Doom. But I think I've read Vulken doesn't support crossfire?Anyone with a link? Thanks!

vulkan*, the developer decides what to support, of course vulkan & dx12 arent going to purposely block CF

 

[AsRock]

I see no video\stream, this screenshot is a terrible example. that screenshot proves that it's not always the case.

 

[Sandbo]

Unless they can provide a instantaneous frame time and fps like Eurogamer did, it means nothing.

 

[champsilva]

mark has to dumb things down in interviews all the time, if he was like that in reality, there's no way the ps4 would have been designed properly

intel's first quadcores were 2 duals 'stitched' together, i'm not sure if they shared some other parts of the logic, but that's likely what ps4 pro has... FINALLY, i've been wondering why we dont have high end gpus like this, we only sometimes see a midrange or lower end gpu that has exactly half specs of the high end one

the heatspreader doesnt show the die of course, different cpus change shape, but the socket size & spreader are the same, we only normally see exposed dies & their real sizes on laptops & gpus



i didnt watch the stream, but are you two basing an entire argument from a screenshot of a video where the game movement is changing at all times!?


vulkan*, the developer decides what to support, of course vulkan & dx12 arent going to purposely block CF

ive watched the entire stream, never a perfect scene.