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Zarniwoop

macrumors 65816
Aug 12, 2009
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West coast, Finland
Sony PS4 4k model is going to have an APU with Polaris 10 in it. If I remember it correctly, the current Pitcairn based GPU has a TDP 100W. (Checked, yes, ~95W)

Current PS4: 1.84 TFLOPs
Next gen: 4.19 TFLOPs

And the thermals will stay same as it is in the current model. So here we see, what the 2.5x improvement in efficiency really stands for. There should be similar 2-2.5x speed improvement in nMP and iMac, when Polaris 10 is out. And the Apple updates as well. So, with 100W TDP, Polaris will deliver 4.19TFLOPs in APU with shared memory. I believe with dedicated GDDR5 it will run even better.

http://wccftech.com/sony-ps-neo-polaris-gpu-4-19-tflops/
 
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koyoot

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PS4K GPU is not Polaris architecture. It must have bit code fully compatible with previous generation of PS4, without any software emulation.

Polaris must have software emulation to get bit code compatible with previous generations of GCN architecture. Thats how different it is.
 
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Zarniwoop

macrumors 65816
Aug 12, 2009
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Well, it's a Polaris derivative. Same number of CU's, Stream Processors and the speed upgrade is 2.3x within old thermal limitations. It would be nice to know, how it scales, when TDP goes up. Does it still has >2x efficiency at 125W or 150W?
 

koyoot

macrumors 603
Jun 5, 2012
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PS4 GPU has similar core count and Memory bus to Pitcairn, yet its core is different(Pitcairn has 2 ACE's, PS4 core has 8 ACE's).

In other words, Pitcairn is GCN 1.0 version of GPU, Console APU is GCN 1.1.

All console APUs are custom cores. They have very little relation to desktop and mobile GPUs.

Overall the jump in efficiency for PS4K APU is due to optimizing the process, and transistor level optimizations, thats why it is possible to get the APU to around 95W.
 
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Zarniwoop

macrumors 65816
Aug 12, 2009
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For me it seems that it's a Pitcairn, where AMD is doing the 2.5x efficiency comparison.

M390 = Pitcairn TDP 100W = 1962 GFLOPs
Polaris 10 = Pitcairn x 2.3 = 4500 GFLOPs = TDP 100W

If Polaris scales well to 125W, it could be 5640 GFLOPs. M395X is 3723 GFLOPs. So, no 2x performance boost for iMac, but still quite an improvement.
 

koyoot

macrumors 603
Jun 5, 2012
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For me it seems that it's a Pitcairn, where AMD is doing the 2.5x efficiency comparison.

M390 = Pitcairn TDP 100W = 1962 GFLOPs
Polaris 10 = Pitcairn x 2.3 = 4500 GFLOPs = TDP 100W

If Polaris scales well to 125W, it could be 5640 GFLOPs. M395X is 3723 GFLOPs. So, no 2x performance boost for iMac, but still quite an improvement.
I don't know, because... even AMD did not know that 2 weeks ago. They have been waiting for Nvidia to show what they could come up with, and then tune clocks, to get more for less from the hardware they could provide. What does that mean?

I don't know. I don't expect that AMD could have answer to GTX 1080, unless the rumor is true, and there will be 3rd GPU based on Polaris architecture but with HBM1, and even higher clock speeds.
 

Zarniwoop

macrumors 65816
Aug 12, 2009
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West coast, Finland
I suppose Fiji will stay in their lineup until Vega rises. If there's not going to be a retooled version of Fiji, AMD will have nothing to compete with GTX 1080 now. Performance wise Fiji is not far away from GTX 1080, but shame the memory limitations.. with 4 GB HBM.

If AMD has a secret ace in their sleeves, it is a refined Fiji.
 

koyoot

macrumors 603
Jun 5, 2012
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Hawaii Pro: 2560 GCN cores, 5.12 TFLOPs, 275W TDP. 18.6 TFLOPs/W. Wikipedia numbers.
Polaris 10: 2560 GCN cores, 1154 MHz core clock. 5.908 TFLOPs of compute power. 18.6 x 2.5 gives 46.5GFLOPs/watt. Polaris 10 compute power divided by that number gives 127W of TDP. So pretty much in line, with what we know.
 
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Synchro3

macrumors 68000
Jan 12, 2014
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Apple should just encourage their core competencies like producing the best possible computers.

They can remain with thin underpowered laptops, but beyond that also produce power machines with replaceable parts like standard M.2 ssd's (not with the proprietary Apple connector), RAM, graphic cards etc.

So a new CEO wouldn't be bad.
 
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pat500000

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Jun 3, 2015
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hey Pat.. and replace him with who, exactly?

be careful what you wish for ;)
... Good question. The candidates got to pass the assessment test: will customers get refresh mp annually without soldering? Gotta find a candidate with high performance with extra memory. I know Mickey Mouse wouldn't be a good one. As I posted a video of Mickey Mouse beating up jonna brothers to go and make him some money.... I was like nope. I believe anyone here in MR site would be a good one. ;)
 

tuxon86

macrumors 65816
May 22, 2012
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Woz would not even be on my list. Great engineer, not so great at running a company.

The best CEO are those that know how to delegate task to those who have the skill and knowledge to make things happens. The problem presently is that all t he top position at Apple are filled with primadona and egomaniac whowon't delegate to those who have the skills and knowledge. Woz, know he isn't a business guru, but he's very intelligent and humble enough to delegate to those who have the required skills.
 

koyoot

macrumors 603
Jun 5, 2012
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Leaked specs of mobile Polaris 10 and 11. One thing to note. Desktop versions will have much higher core clocks. Also the ones in mobile space are cut-down parts.
 

Stacc

macrumors 6502a
Jun 22, 2005
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PS4 GPU has similar core count and Memory bus to Pitcairn, yet its core is different(Pitcairn has 2 ACE's, PS4 core has 8 ACE's).

In other words, Pitcairn is GCN 1.0 version of GPU, Console APU is GCN 1.1.

All console APUs are custom cores. They have very little relation to desktop and mobile GPUs.

Overall the jump in efficiency for PS4K APU is due to optimizing the process, and transistor level optimizations, thats why it is possible to get the APU to around 95W.

Rumors here suggest that the new PS4 will be based on the Polaris core. Originally they were not going to make any changes to the GPU architecture but once they saw the potential of Polaris they changed their minds. I bet one of the reasons for targeting polaris for "mainstream performance" is that it would fit in a console.

It will be interesting to see how many compute cores Polaris 10 ends up with. Rumors today suggest 2048 cores at 1350 Mhz, but that is likely cut down. I could see that being a top end mobile part. I am still betting the chip itself has 2560 cores. If it clocks to 1350 Mhz that would be a nice chip indeed.
 

koyoot

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Jun 5, 2012
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Guys, the words I am saying to you about PS4K are coming from PS4 game developer, who had in hands both GPUs.

They are not compatible on software side. Binary code will be different on Polaris, therefore backwards compatibility with previous generations of GCN arch has to be emulated. Sony would need exact binary copy for Polaris GPU. But the arch. is different. PS4 OS does not have capabilities to do this.

There is no coincidence that today, day after debunking of rumors, there is another rumor about performance of mobile Polaris GPUs. What is worth noting is that GTX 1080M will have 2048 CUDA cores, and 1.3 GHz core clocks...

AMD yesterday played smart. They had to get rid of rumors, without disclosing anything. Today a lot of concrete news came about. There no coincidence in this.
 
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pat500000

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Guys, the words I am saying to you about PS4K are coming from PS4 game developer, who had in hands both GPUs.

They are not compatible on software side. Binary code will be different on Polaris, therefore backwards compatibility with previous generations of GCN arch has to be emulated. Sony would need exact binary copy for Polaris GPU. But the arch. is different. PS4 OS does not have capabilities to do this.

There is no coincidence that today, day after debunking of rumors, there is another rumor about performance of mobile Polaris GPUs. What is worth noting is that GTX 1080M will have 2048 CUDA cores, and 1.3 GHz core clocks...

AMD yesterday played smart. They had to get rid of rumors, without disclosing anything. Today a lot of concrete news came about. There no coincidence in this.
I read it somewhere that AMD addressed/ or debunked some rumor stuff.
PS4 will not have backward compatibility?
 

Melodist

macrumors regular
Sep 30, 2015
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Guys, the words I am saying to you about PS4K are coming from PS4 game developer, who had in hands both GPUs.

They are not compatible on software side. Binary code will be different on Polaris, therefore backwards compatibility with previous generations of GCN arch has to be emulated. Sony would need exact binary copy for Polaris GPU. But the arch. is different. PS4 OS does not have capabilities to do this.

There is no coincidence that today, day after debunking of rumors, there is another rumor about performance of mobile Polaris GPUs. What is worth noting is that GTX 1080M will have 2048 CUDA cores, and 1.3 GHz core clocks...

AMD yesterday played smart. They had to get rid of rumors, without disclosing anything. Today a lot of concrete news came about. There no coincidence in this.

I personally don't care about rumors, I'd like to see results and real announcements and until then, you can only speculate so I stick with what's out, which in this impressive case is NVida for now. Let's wait and see what AMD will come up with.
 

koyoot

macrumors 603
Jun 5, 2012
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I read it somewhere that AMD addressed/ or debunked some rumor stuff.
PS4 will not have backward compatibility?
LOL Wut? When I did said that? :D

In order to maintain backwards compatibility with PS4 PS4K must use similar binary code for the architecture, without software emulation, of the previous version of GCN, IF Sony will use Polaris chip in the PS4K. It was confirmed by PS4 game developer, who had the GPU on his hands, and it was confirmed by person who is responsible for Linux drivers.
Polaris is not backwards compatible with previous generations of GCN, without software emulation of them - drivers.

Thats why they cannot use Polaris in PS4K IF they want backwards compatibility with PS4.

Melodist, Nvidia pretty much did 1.9x more performance in the same thermal envelope for their midrange GPU.
 
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Melodist

macrumors regular
Sep 30, 2015
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I read it somewhere that AMD addressed/ or debunked some rumor stuff.
PS4 will not have backward compatibility?

Look, we don't have to speculate on whether the PS4k will be backwards compatible or not, simply because if it isn't, it'll be dead in the water right from the start. The only way for Sony to launch an upgraded console is to not piss of their existing customers. Also, why would they release a console without content at all while their current model sells so well? If Polaris isn't backwards compatible, then the PS4k won't have it, simple as that.

Also, why do we talk about the PS4 anyways? lol And what does Polaris have to do with a better / new Mac Pro? Stop comparing tech, because at the end, Apple will put in their Macs whatever is the cheapest in consultation with certain quality requirements.
 
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