By using this site, you agree to our Privacy Policy and our Terms of Use. Close

Forums - Gaming - Anybody think 8 gb of GDDR5 is a mistake for PS4

fordy on 12 March 2013
drkohler said:
fordy said:


So why not have the best of both worlds and remove the latency overhead when moving to cache?

There's a reason WHY we aren't using GDDR5 as CPU memory in PC architecture. Use your head.

Let me guess: you did not understand what I wrote and you don't understand why there is memory latency anytime, anywhere. The three key reasons why we never had gddr5 as main memory in the pc world are (by order of importance): price, price and price.


Let me guess: You have some odd belief that buffering/caching comes at absolutely NO cost for a punish/miss routine, and that there's not such thing as latency. Once again, GDDR5 is to handle LARGE chunks of data, not the small blocks of an instruction cache.

If you think price is any factor for not using GDDR5 as ssytem memory, then you're completely delusional. For starters, there has always been a transition period between current and new RAM tech, where the new has alwyas been tremendously more expensive. Price does NOT stop a market transition, especially to enthusaists. Secondly, given the vast amounts of GDDR5 on relatively cheap video cards nowadays, your theory of price should have been enacted long ago. So why wasn't it? BECAUSE GDDR5 IS NOT OPTIMALLY FEASIBLE FOR SYSTEM RAM. End of story.



Around the Network
Kasz216 on 12 March 2013
ethomaz said:
Kasz216 said:
No. Had they gone with 6 GDDR5 and 2 DDR3 it would of been a better option... Or even a 4/4 split... but all that ram should be helpful especially as games move away from being pure gaming related.

8 was definitely a better choice over 4.
The new AMD APUs uses the HSA for shared memory... there is no option for two types of memory.... Sony have trouble with separated memory pool with PS3 and a shared memory like the used in the APU give to developers more options and control over what they develop... but I have certain you know that.

The PS3's seperated memory pool was a problem because... they didn't have ENOUGH memory... it was designed poorly.

The PS3 had two seperate 256 pools of Ram.

Even with 4GB, Shared makes sense.

8GB?  Makes a hell of a lot more sense to have different "specialist" Rams working on what they do best.

I mean... it's common sense.



ethomaz on 12 March 2013
Kynes said:
AMD has left the VLIW architecture mostly due to the problems they had to optimize the real time compiler they had to use to feed the 5WAY units. It also helped on the GPGPU front, but ask any bitcoin miner if the 5870 graphics chips were good to do mining. PS3 api is mostly OpenGL, you don't use assembler to develop for it. Even CUDA is a high level language, and it's the closest to the metal you develop on nVidia cards.

Of course I will keep on calling you a bullshiter, because that's what you are doing right now.

So I can call you a bulsshiter too?

1. The VLIW to SIMD help GPGPU not graphcis processing.
2. Only 1% of the games in PS3 uses OpenGL... libgmc is the official Sony API for 99% of the games.

Edit- Fixed the name... libgmc



fordy on 12 March 2013
ethomaz said:

fordy said

There's a reason WHY we aren't using GDDR5 as CPU memory in PC architecture. Use your head.

That will change... AMD will use GDDR5 for the new APUs too.


So  what if they do? If they do, it's only to give the GPU a boost at the expense of CPU.

Once again, there's a reason why it's prefixed with a "G"



ethomaz on 12 March 2013

Kynes said

So you say they won't use DDR3 or DDR4 on their new APUs? Do you want to make a bet?

No I said the AMD will support GDDR5 in the new memory controler for APU and the manufacture will choose to use the memory... so there will be PC with these APU using GDDR5.

If it is so bad then why the AMD is putting GDDR5 support in their APUs?



Around the Network
walsufnir on 12 March 2013

ethomaz said:

2. Only 1% of the games in PS3 uses OpenGL... libgm is the official Sony API for 99% of the games.


As you wrote it wrong twice: I thing it's called libgcm, not libgm.



Kasz216 on 12 March 2013
ethomaz said:

Kynes said

So you say they won't use DDR3 or DDR4 on their new APUs? Do you want to make a bet?

No I said the AMD will support GDDR5 in the new memory controler for APU and the manufacture will choose to use the memory... so there will be PC with these APU using GDDR5.

If it is so bad then why the AMD is putting GDDR5 support in their APUs?


Because their new APU line is largely targeting the Phone and Tablet markets where there is little CPU use... since nobody usese their phones or tablets for number crunching or in depth videogames with complicated AIs... but do want high end graphics.

They're willing to sacrifice CPU use for graphics in more "fluff" machines and low end PCs.



ethomaz on 12 March 2013
walsufnir said:

ethomaz said:

2. Only 1% of the games in PS3 uses OpenGL... libgm is the official Sony API for 99% of the games.


As you wrote it wrong twice: I thing it's called libgcm, not libgm.

lol thanks... but the point is not the name itself I was just point the PS3 games didn't use OpenGL and the guy said I'm wrong.



Kynes on 12 March 2013
ethomaz said:
Kynes said:
AMD has left the VLIW architecture mostly due to the problems they had to optimize the real time compiler they had to use to feed the 5WAY units. It also helped on the GPGPU front, but ask any bitcoin miner if the 5870 graphics chips were good to do mining. PS3 api is mostly OpenGL, you don't use assembler to develop for it. Even CUDA is a high level language, and it's the closest to the metal you develop on nVidia cards.

Of course I will keep on calling you a bullshiter, because that's what you are doing right now.

So I can call you a bulsshiter too?

1. The VLIW to SIMD help GPGPU not graphcis processing.
2. Only 1% of the games in PS3 uses OpenGL... libgm is the official Sony API for 99% of the games.

1.- I said it before. It helps GPGPU, but the change was made mostly to reduce real time compiler work, as it's much harder to optimize for a VLIW5 architecture than for a scalar architecture. Take a look at http://www.xtremesystems.org/forums/showthread.php?279169-GCN-vs.-VLIW5-performance-improvements

2.- LibGCM is based on OpenGL ES.



Kasz216 on 12 March 2013
ethomaz said:
walsufnir said:

ethomaz said:

2. Only 1% of the games in PS3 uses OpenGL... libgm is the official Sony API for 99% of the games.


As you wrote it wrong twice: I thing it's called libgcm, not libgm.

lol thanks... but the point is not the name itself I was just point the PS3 games didn't use OpenGL and the guy said I'm wrong.

That's because you are wrong.  LibGCM is a customized OpenGL.

I'm more and more convinced you aren't a developer.

I feel like your just info diving till you reach something you think proves your point... without bothering to read the whole thing or get an overview to check your points.

Again you aren't trying to learn anything, just trying to prove a point, regardless of what the facts may show.