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AMD: PlayStation 4 supports hUMA, Xbox One does not

ElTorro

I wanted to dominate the living room. Then I took an ESRAM in the knee.
AMD states that PS4 doesn't even support hUMA. So what the hell is this thread all about.

Implying that the PS4 chip is a Kaveri chip is "erroneous", not that PS4 has hUMA. In fact, it is certain that it has hUMA, since the layout of the Onion/Garlic bus as well as the "voltatile tag" Cerny talked about are pretty much that: hUMA.
 
I believe that writer got it wrong. Plain and simple.

Also in this statement:-



AMD states that PS4 doesn't even support hUMA. So what the hell is this thread all about.

I've had customer support tell me they didn't make a particular model of card before while holding it while on the phone. Why would you ever believe a 10 dollar an hour worker reading from canned responses.

Ps my card was oem not retail.
 

Hana-Bi

Member
But that says nothing about them stating that the PS4's APU was the most powerful they have ever produced...

Considering they also produced the Xbone's GPU...that's a clear connect the dots situation...

Honestly, that email sounds like a typical PR response...somebody on the show floor said something off the record that they should not have said publicly..now CS/PR has to clean up his mess and downplay it because they don't want to offend their OTHER customers...

Didn't they said this before the X1 was revealed? So - of course the PS4 would be the most powerful console at that time because the X1 wasn't announced.
 

USC-fan

Banned
I believe that writer got it wrong. Plain and simple.

Also in this statement:-



AMD states that PS4 doesn't even support hUMA. So what the hell is this thread all about.

Pretty funny you believe some random forum post over the article so quick.

We have great detail over the console memory systems. Sony has even added extra bus beyond the HSA design in AMD right now. Also AMD rolled all changes made by sony into their HSA design. Sony also join HSA and ms has not...
 

gofreak

GAF's Bob Woodward
AMD states that PS4 doesn't even support hUMA. So what the hell is this thread all about.

Doesn't quite say that. The rep is speculating about the logic that could have lead to the writer to that conclusion (Kaveri is coming out around the same time, ergo PS4 is Kaveri, ergo PS4 is hUMA), and that that logic would be faulty because these are custom chips. He's avoiding actually saying anything about the capability of those chips.

( FWIW, I personally think in PS4's case the features Cerny disclosed mean you can meet hUMA criteria outlined earlier, but in a more hand-guided way than AMD might envisage for their own or future chips. It may not come as automatically, the programmer has to guide things along with the right bus choices and cache tags )
 
Looking at that diagram, I wonder if the L2 cache is modified in the PS4. Kabini has 2MB shared between 4 cores, but that's showing 1MB shared between 2 cores.

I made that diagram based on the info here:

http://en.wikipedia.org/wiki/Jaguar_(microarchitecture)#Design
  • 32 Kilobyte L1 instruction cache per core
  • 32 Kilobyte L1 data cache per core
  • 1 Megabyte unified L2 cache shared by two cores

Then again, near the top of the page on the right it says:
  • L1 cache 64 KB per core[1]
  • L2 cache 1 MB to 2 MB shared

So, I'm not too sure. I do know that the PS4 Jaguar has 4mb... so, it's at least 2mb per 4 cores.
 
I don't care anything about that. I have stated that the words attributed to the AMD guy in the OP's article were wrong.
It appears I was right.

I don't understand this shield some fans create where PR is where the truth lies.

The article says:

This was explained by AMD's Senior Product Marketing Manager Marc Diana to c't [big German IT magazine] at gamescom.

Explained by A) to B). There isn't a quotation, but saying they weren't explained so is calling them liars.

This should put the 3D-performance of PlayStation 4 much farther ahead of Xbox One than many have expected so far. AMD sees hUMA as a key element for drastic performance improvements in combined processors. AMD's upcoming Kaveri desktop processors support hUMA as well.

Clearly this is the author of the article drawing his own conclusions, based on what AMD envisions for the future and how they have leveraged the technology so far.

Behind the scenes, c't could hear from developers that the 3D-performance of PlayStation 4 is very far ahead of Xbox One.

Oh wait.... they are lying right, or just not understanding what they are being told. I mean, there are no quotes here!!
 

DNaDe

Neo Member
Posters early in the thread: When AMD says things you listen
Posters now: That response doesn't mean anything!
 
:lol

Is COD an Xbox One timed exclusive or something? (sorry haven't played it since MW2).

The game is not timed exclusive. DLC will be.

Putting COD aside, though- anyone who thinks MS is in a position to ship 5 million XB1's for December needs to stop posting for a while and read up on how console launches work.
 

Curufinwe

Member
Doesn't matter how good the GPU is if the only exclusives they make for their console are indie games.
Go PC for the rest.

I didn't realize Naughty Dog and Sony Santa Monica announced all their top people left and they weren't making PS4 games anymore.
 

Krakn3Dfx

Member
Doesn't matter how good the GPU is if the only exclusives they make for their console are indie games.
Go PC for the rest.

Yep, just indies...
image_killzone_shadow_fall-22861-2660_0002.jpg
 
AMD's chief graphics architect, John Gustafson, had to temper his excitement about the tech in Sony's console back in April, remarking: "The PlayStation 4 blew me away but I’m conscious about being too positive about it because of course we have other partners that are competing."

Gustafson did not wish to offend Microsoft, which is understandable.

There was another quote, that I am having difficulty finding, in which Gustafson speculated if Sony engineers were cognisant of 'just how much' untapped potential PS4 has to offer.
 
I can see it now.



hUMA vs The Cloud


"Tonight's matchup is scheduled for 1 fall. In the red corner, represented by Sony Computer Entertainment, wearing the blue trunks. hUUUUUUUUUUUUUMMMMMMMMAAAAAAAAAAAA!
And in the blue corner, representing Microsoft, wearing the green trunks, DAAAAAAAAAAAAAAAAAAAAAA CLOOOOOOOOOOOOOOOOUUUUUUUUUUDDDDDDDD!"
 

DrM

Redmond's Baby
Heise.de is very reliable and I think that they got this right and are not selling BS around.
 
That's weird... From the vgleaks diagrams it seemed that xbone had everything in place for it. If not then what is that 30GB/s link for coherent access between cpu and gpu for?
 

Busty

Banned
Why are so many people trying to swim upstream on this?

Some of the posters in here could get a morning show on FOX news with the amount of 'questioning' and spinning they are doing in this thread.
 
I doubt what we saw of Infamous Second Son would be possible on XBO.

Or even worse, the real time tech demo from Quantic Dream (the sorcerer).

LOL really now? What you see in Infamous is absolutely possible on the Xbox One. Let's not get crazy here. Also, it sounds to me like the article is making some big assumptions, but aside from that it doesn't really matter.
 

ElTorro

I wanted to dominate the living room. Then I took an ESRAM in the knee.
AMD's chief graphics architect, John Gustafson, had to temper his excitement about the tech in Sony's console back in April, remarking: "The PlayStation 4 blew me away but I’m conscious about being too positive about it because of course we have other partners that are competing."

Gustafson did not wish to offend Microsoft, which is understandable.

There was another quote, that I am having difficulty finding, in which Gustafson speculated if Sony engineers were cognisant of 'just how much' untapped potential PS4 has to offer.

The point here is that, leaving the actual impact on performance and potential marketing intentions from AMDs aside, it is technologically credible that the PS4 implements hUMA while the XB1 does not. All information on the PS4's memory system so far pretty much describes a hUMA architecture. The Onion/Garlic busses and the volatile tag on cache lines confirm that with certainty. Conversely, the XB1 has a custom memory system and in which its custom move engines play a big role in data management. It's very possible that hUMA cannot be integrated into this architecture since managing cache coherency might simply be more complex. Instead, memory management is supported by its move engines.

I don't see any reason not to trust c't on this point.
 

steinmc

Member
Oh wait.... they are lying right, or just not understanding what they are being told. I mean, there are no quotes here!!

I think, that the PS4 uses this technology, but heise is not a fan of Microsoft. Even at the launch of the Xbox360, they made some statements about the (missing) Xbox360 power, which turned out not to be correct.
 

nib95

Banned
We've seen both drive club and forza 5 and no one can say that drive club looks better.

DriveClub absolutely looks better, it just doesn't run nearly as smooth, which kind of throws the comparison in the air. But given the massive improvement it's had in the new build, I have faith in Evolution for launch. In-fact, all the PS4 first party stuff has had big improvements from E3 to Gamescom.
 
The xbox one SOC will be discussed at next weeks hot chips conference. A 30 min presentation will be given on it. We'll likely learn much more about it then, and will hopefully get some specifics regarding cpu, gpu, huma, etc.
http://www.hotchips.org/
 

QaaQer

Member
I think, that the PS4 uses this technology, but heise is not a fan of Microsoft. Even at the launch of the Xbox360, they made some statements about the (missing) Xbox360 power, which turned out not to be correct.

So he is a liar who hates Microsoft and is intending to slander their product?
 

cyberheater

PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 Xbone PS4 PS4
Once again you show terrible reading comprehension skills, and when used for confirmation bias it's just an incredibly poor look.

Show me where in the recent response from AMD where they state that PS4 has hUMA.
 
Interesting, considering Forza 5 and Ryse look better graphically than any PS4 game.



Link? I didn't know this was proven yet!


Oh well. I will just continue to read the long explanations of how AMD doesn't know what they are talking about and the author of this article is wrong. It has been entertaining.
 

cyberheater

PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 PS4 Xbone PS4 PS4
The point here is that, leaving the actual impact on performance and potential marketing intentions from AMDs aside, it is technologically credible that the PS4 implements hUMA while the XB1 does not. All information on the PS4's memory system so far pretty much describes a hUMA architecture. The Onion/Garlic busses and the volatile tag on cache lines confirm that with certainty.

Yep. I think Sony have implementation of something similar to hUMA. And so has MS.
 

wildfire

Banned
yes and no.

the new consoles are x86, meaning easier portability of code between console and PC than we've ever seen before- outside of the original xbox in 2001, which had very little market share.

This time around both the ps4 and the xbone will be using identical AMD designs- meaning greater support for AMD, even if Nvidia still dominates the PC space. no dev will have the luxury of just ignoring AMD platforms, console marketshare is simply too large.

Since this tech is specifically for their integrated GPU with CPUs for the next year or 2 there is no advantage to be had unless you are buying a laptop under $600.
 

ElTorro

I wanted to dominate the living room. Then I took an ESRAM in the knee.
Gemüsepizza;77560749 said:
In which universe does *customer support* answer such questions?

I am actually not feeling comfortable with that supposed answer from customer support, since they usually indeed don't answer such question, and the fact that the screenshot only shows a header, not the entire mail, is somewhat fishy. It was also a very fast answer (15 minutes?) on such a rather delicate topic…

/edit: I'll remove it and will add any official answer von AMD from a reliable source, if they publish any
 
The point here is that, leaving the actual impact on performance and potential marketing intentions from AMDs aside, it is technologically credible that the PS4 implements hUMA while the XB1 does not. All information on the PS4's memory system so far pretty much describes a hUMA architecture. The Onion/Garlic busses and the volatile tag on cache lines confirm that with certainty. Conversely, the XB1 has a custom memory system and in which its custom move engines play a big role in data management. It's very possible that hUMA cannot be integrated into this architecture since managing cache coherency might simply be more complex. Instead, memory management is supported by its move engines.

I don't see any reason not to trust c't on this point.

The move engines aren't the only way to handle memory on the Xbox One. They are just one way to handle memory while using notably less resources. Also, the PS4 itself likely has similar hardware, except they're likely just called plain old DMA as opposed to Move Engines, and Microsoft apparently decided to put more DMA units in the Xbox One with certain fixed function capabilities. So to say that hUMA can't be integrated into this architecture when the PS4 likely shares similar DMA components seems pretty contradictory.

The XB1 isn't forced to use the Move Engines for its data management, as it can handle memory in a more traditional way using shaders. They're just an option that should help the system better utilize the ESRAM, and that helps the system move data around without exhausting all the memory bandwidth in doing so. It seems to me that the move engines themselves shouldn't be a huge obstacle to hUMA based on how it's described, but maybe the ESRAM itself might introduce some complications. I don't really know the details, but the Xbox One's memory system shows very clear and obvious coherency as described in HUMA between the GPU memory sub-system and the CPU. Isn't hUMA all about data coherency between the GPU and CPU?
 

Bundy

Banned
Interesting, considering Forza 5 and Ryse look better graphically than any PS4 game.
This is, actually, wrong.
Killzone: Shadow Fall is currently the best looking launch game.
Just look at the multiplayer footage. It looks as good as the single-player part. Amazing!
 

QaaQer

Member
I am actually not feeling comfortable with that supposed answer from customer support, since they usually indeed don't answer such question, and the fact that the screenshot only shows a header, not the entire mail, is somewhat fishy. It was also a very fast answer (15 minutes?) on such a rather delicate topic...

Anyone who thinks that is a legit email is pretty gullible.
 

wildfire

Banned
Maybe AMD realizes the PC market is withering and the real volume in coming years in console and mobile markets.

General PC sales are down.

Gaming PC sales are up.

http://www.techpowerup.com/188572/g...re-sales-shrug-off-pc-market-decline-jpr.html


Straight from the horse's mouth. No salt, no sodium, no ulterior motives. Plain and simple.

Of course there is an ulterior motive. That motive is to sell more chips in the PC market.
 

Abominuz

Banned
Can someone please tell me why everyone is saying third party titles will be equal ?
Thats just bullshit, a lot of titles are developer seperatly.
Not all titles are just ported.
The way the consoles are built it will not take a lot of time and money to get the most out of the ps4.
And if a developer is not lazy or bought by MS, the third party titles will not be the same period.
 
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