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[phandroid] New Samsung Exynos 5 Octa announced, 20% better processing with double the graphics powe - Page 2

post #11 of 15
Quote:
Originally Posted by Just a nickname View Post

Obviously for the note 3. I wonder if they will release a "super" s4 with that.

Depends, there are rumors of Note 3 using Snapdragon 800(whose Adreno 330 GPU is very powerful as well). the GS4 LTE-Advanced version uses Snapdragon 800 already so I don't think there will be a 5420 version. We will know by September(Note 1 & 2 were announced at the begining of September at IFA) which one will be used for Note 3.
Quote:
Originally Posted by DuckieHo View Post

No change in cores.... is there a change in CPU clocks?

Yes.

A15 1.6->1.8Ghz, A7 1.2->1.3Ghz.
Edited by sherlock - 7/23/13 at 6:49pm
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post #12 of 15
Quote:
Originally Posted by sherlock View Post


Depends, there are rumors of Note 3 using Snapdragon 800(whose Adreno 330 GPU is very powerful as well). the GS4 LTE-Advanced version uses Snapdragon 800 already so I don't think there will be a 5420 version. We will know by September(Note 1 & 2 were announced at the begining of September at IFA) which one will be used for Note 3.
Yes.

A15 1.6->1.8Ghz, A7 1.2->1.3Ghz.

 

Quote:
Originally Posted by DuckieHo View Post


No change in cores.... is there a change in CPU clocks?


The increase in clockspeed doesn't account for the full difference claimed. Samsung probably switched to a newer revision of A15 in addition to changing the GPU. Even if they didn't change revisions, there's a lot of levers that can be pulled that change IPC quite a bit. Here's the non-confidential (ARM locks lots of technical info behind an NDA) technical manual for A15r4 (warning: pdf).

http://infocenter.arm.com/help/topic/com.arm.doc.ddi0438i/DDI0438I_cortex_a15_r4p0_trm.pdf


Edited by hajile - 7/23/13 at 7:02pm
post #13 of 15
Quote:
Originally Posted by hajile View Post



The increase in clockspeed doesn't account for the full difference claimed. Samsung probably switched to a newer revision of A15 in addition to changing the GPU.

They could have also implemented Big-Little better, as 5410 was by no means a perfect implementation.
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post #14 of 15
My guess is that there's significant firmware/software changes going on here as well. If I remember correctly, both the A7 and A15 can't be used together yet due to software limitations. Possibly they've fixed this by now, along with other performance tweaks and improvements.
post #15 of 15
Quote:
Originally Posted by sherlock View Post


They could have also implemented Big-Little better, as 5410 was by no means a perfect implementation.

I updated my previous post with a technical link. Big.little isn't really a performance issue. Since only the A15 OR the A7 are active at any given time (a software limitation btw), they don't have a huge bearing on overall performance. The only loss is that associated with transferring part of the state from the A15 to A7 or vice versa. If their A15 implementation was lacking some of the bells and whistles offered, then they could increase IPC that way (as I stated in my edited post), but it's worth noting that ARM leaves a lot of behind the scenes improvements hidden with that "various engineering errata fixes" line (if you doubt that, compare Nvidia's tegra4i performance improvement list for A9r4p1 compared with ARM's non-confidential list).

 

@eatfoodnow

I doubt the software is the serious issue. The technical reason for not enabling it in phones and tablets is power consumption and TDP. I'm guessing if it ever graces a Samsung SmartTV that we'll see all the cores working together, but not in such small devices.


Edited by hajile - 7/23/13 at 7:20pm
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