Shadow Hog
Member
PS4 is just two Gamecubes duct-taped together
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Rumor: PS4 GPU based on AMD's GCN 2.0 architecture?
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Maximilian Kolbe
Member
Few days ago,a AMD employee in chinese forum also talked about this
http://i.minus.com/ilbCScleHe1sD.jpg (Since he ask people don't quote him i won't use )
He said both PS4&720's GPU are GCN 2.0,and both even use same GPU,just MS ask AMD delete 6CUs for ESRAM,reason?other than DDR3,some people in that forum also think it's for BC.
http://i.minus.com/ilbCScleHe1sD.jpg (Since he ask people don't quote him i won't use )
He said both PS4&720's GPU are GCN 2.0,and both even use same GPU,just MS ask AMD delete 6CUs for ESRAM,reason?other than DDR3,some people in that forum also think it's for BC.
phosphor112
Banned
Not enough GDDR5!
It isn't an architectural change per se, and a lot of the devkits are running "close-to spec" PC-equivalent hardware and not the specific PS4 hardware that will be present in the final box.
APU is done, there's nothing to change at this point. Suppliers will start mass manufacturing of components in Q2 with assembling of retail units in Q3.
Galacticos
Banned
iamshadowlark
Banned
I'll say the same thing I said when 720 was rumored to have GCN2 which is, it's nothing to get terribly excited for. Changes seem minimal at best. Still good news though.
Maximilian Kolbe
Member
I don't know(not really following spec),but since he's angry about MS's next console will not as good as PS4(he is MS fan),i choose wait and see.
Boss Man
Member
According to what we know, kind of know, and don't know, it's looking to me like Durango will have a significantly more powerful CPU and PS4 will have a signicantly more powerful (and well-fed) GPU.
Gonna probably have a lot of threads about GPU computing after MS unveils, to figure out how these differences might play out. Also probably gonna see a lot of people try to downplay GPU computing as a buzzword or something like the GDDR5 stuff that's happening now.
Gonna probably have a lot of threads about GPU computing after MS unveils, to figure out how these differences might play out. Also probably gonna see a lot of people try to downplay GPU computing as a buzzword or something like the GDDR5 stuff that's happening now.
It was rumoured (for MS) that it was based on the GCN2.0 + Cape Verde with CUs added. If the Sea Island equivalent of Cape Verde (8770) has 12CUs then it would be proper match with core being down-clocked.
I heard yonks ago that Sony was optimising for 'fine grained compute' (and tessellation, fwiw - not sure these ACE improvements have any relevance there).
Cerny mentioned in his presentation that they'd customised the chip so it could perform better for GPGPU.
This talk about ACE modification is in line with those things.
Doesn't mean the chip is vanilla GCN 2.0, though - not sure what AMD's plans are for ACE config in GCN 2.0.
Galacticos
Banned
Doesnt matter, if the rumors are true, there is going to be a noticeable difference in game performance.
Lord Error
Insane For Sony
Was there any talk about the 14+4 CU distribution, or the lack thereof? The press release document lists the 18 CUs as being at disposal to be used for anything with no limitations - but Cerny has also said in his speech that they've "made computing easy" for developers or something to that effect, which I thought was maybe hinting at 4 CUs being isolated primarily for that purpose, as rumored.
Yes, I wonder now if the comment was about this modification.
Emmm no, don't be disappointed later. We had enough of secret sauces.
CPU is the same setup of 8 Jaguar cores. Even if there are further tweaks they won't lead to anything like 'significaly more powerful'.
The CPU in the PS4 and Durango won't be identical.
nelsonroyale
Member
Wasn't it rumoured that Durango had more cores closed off for OS and other functionality ? I wonder if that is still the case, and if so, how it will enter into the equation. There has only been one source that claims the CPUs are different however, so it would be nice to have some other sources indicate as such.
As far as we know right now all 18CUs are available, and none are "reserved", giving the developers the ability to use them and assign them as they please (hence making it easier for developers). For other tasks like the OS and video decoding/encoding, they use custom hardware.
TheGuardian
Member
Precisely because GPU processing depends on parallelism, you need to ensure that you keep it well fed otherwise massive amounts of the GPU will stall.
It's still a 8 cores Jaguar setup based on all the sources which proved to be legit (vgleaks, edge, eurogamer) It won't have magically twice the flops if that's the rumor people are referring to
It's still a 8 cores Jaguar setup based on all the sources which proved to be legit (vgleaks, edge, eurogamer) It won't have magically twice the flops if that's the rumor people are referring to
Vgleaks will reveal the CPU info soon
Probably.
He said exactly:
He then went on to show the 'million objects' Havok demo.
One of the complaints I saw about GCN wrt GPGPU was that mixed tasks and mixed scheduling was not optimal. Indeed, AMD recommended in APU+GPU setups to put GPGPU on the APU and graphics on the separate GPU to avoid this problem. I would guess the beefing up on the ACE side here is to relieve that problem on a single GPU.
It also jives with the earlier idea of improving 'fine grained' compute performance - fine-grained = lots of switching = need good scheduler and switching performance to keep things chugging along optimally.
Wow, would be awesome if true. Seems like GCN2 is more of an improvement than I was told as well. It would definitely take PS4's performance up quite a notch in terms of rendering and would make it even more useful for compute data.
I'm also expecting Durango to be GCN2, given the lower clock speed and the fact we've been hearing that about it for a while.
Really curious for more hard details about the CPU. Seems like we have the least amount of info on that so far. GPU and RAM are in great shape, so I hope to be pleasantly surprised by the final CPU setup. PS4 sounds way more custom than I think anyone was expecting.
I'm also expecting Durango to be GCN2, given the lower clock speed and the fact we've been hearing that about it for a while.
Really curious for more hard details about the CPU. Seems like we have the least amount of info on that so far. GPU and RAM are in great shape, so I hope to be pleasantly surprised by the final CPU setup. PS4 sounds way more custom than I think anyone was expecting.
Boss Man
Member
I think there were actually a couple, and both were rather legitimate. It also makes sense given what we think MS is going for.
Vgleaks will reveal the CPU info soon
Ah nice, it's good to have more details about it.
So, to clarify, CGN2.0 brings greater efficiency by splitting up instructions/data even further (meaning, it hypothetically acts as if it had 2x stream procesor)? If that's the case would the developers have to spend more time to capitalize on benefit of the extra parallelism or would the hardware by itself process that task?
Would the Kinect have it's own rudimentary (first step) processor or will it rely on the actual console (which would lend more sense to MS's modifications with the CPU being more drastic than PS4's)?
I've been hearing 2 cores closed off for various reasons in Durango and half a core reserved for OS in PS4. Not sure how legit those numbers are though. It would be interesting to see how it would pan out between Durango having a higher flop rated CPU with fewer cores available versus PS4 with less flops but more cores.
Kung Fu Grip
Banned
Are you basing this off that certain post?
Coulomb_Barrier
Member
I agree. I followed that Durango 'more efficient CPU' rumour from its inception.
It seems to trace back from a guy on B3D who said that was his 'interpretation' of the Durango CPU looking at the VG Leaks leaked specs. Then, soon after a poster here called Bgassassin said basically that this is all true...
So I wouldn't put much substance into that. Having said that I am open to changing my mind if someone can send me another source to this CPU rumour.
it means the GPU can be split up to do even more computing tasks at once basically making the GPGPU more like a powerful CPU.
in other words damn any talk about the weak Jaguar CPU because the General Purpose Computing can be split up even more between the CPU & GPGPU.
could Next Gen see 1 of the biggest improvements between console gens do to GPGPUs?
Better in Durango, right?
That and something else. But I'll see if that checks out.
Not by much. This won't be a PS3 CPU difference.
It's funny when people post about secret sauces when Sony is the one with it.
Yeah.
Boss Man
Member
To be clear: I do not have any inside information. But I would guess that it would be both, although focusing on a more powerful/efficient CPU would be there mostly for apps and OS functions not necessarily just Kinect.
Coulomb_Barrier
Member
Who/what is the source of that rumour? It seems very spurious to me considering that none of the main leaks covered it in any way.
Both CPUs are the same imo until I hear something from a credible source and not just a post on a forum.
Vgleaks have been uncovering SuperDaE's leaks in slowmotion to garner more website hits.
TheGuardian
Member
Well, first of all, the rumor itself does not mention GCN2.0 at all, just an hardware change from normal GCN. Second, such a modification would essentially add hardware responsible for handling the job distribution and keeping the GPU fed. The developer time involved to take advantage of it would be minor to non existent depending on the implementation.
AgentP
Thinks mods influence posters politics. Promoted to QAnon Editor.
You need to knock this shit off. You don't know anything that isn't public.You running back and forth to B3D and using selective rumor mining is not inside knowledge.
What are you talking about... Having more threads with the same total raw performance is never an improvement. Better dispatching yeah, that's an improvement.
dragonelite
Member
I know you want both consoles to be identical, but they probably won't be.
I know you probably want the PS4 to have an edge on everything too, but with a fucking powerful GPU why would they even need it?
You ever thought the Durango might need a slightly better CPU to power Kinect?
Relax, it's not a big deal.
This got old fast :/ people should stop shitting every thread with this.
To continue with the topic, Since I'm no tech savvy how does this helps game development?
phosphor112
Banned
Since I "shat" on the thread. I'll help you out.
It'll allow better management of compute (things like physics) and non-compute tasks on the GPU. Basically making it a GPGPU (General-Purpose GPU). It's not saying that it's BAD at graphics, but it's saying it can act as a CPU if needed. Adding ACE's will allow this to happen without hitches.
In the end, the most apparent advantage is better graphics and physics without having the GPU take an unnecessary hit.
Osiris
I permanently banned my 6 year old daughter from using the PS4 for mistakenly sending grief reports as it's too hard to watch or talk to her
None of these respond to his actual post, where he says you need to can it with the subtle BS hints that you have insider knowledge.
He's right, you really do need to knock that shit off.