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Official specifications of the Allwinner A31


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#21 wurstt

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Posted 30 December 2012 - 06:36 AM

Posted Image

source: http://pad.zol.com.cn/344/3441258.html

But there are other sources like a new tablet with a A31 clocked at 1.6 ghz and most sources tells us that clockspeed is 1.3 ghz

#22 Shenmue

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Posted 30 December 2012 - 04:42 PM

Cpu Frequency should be close to 1.6ghz.and we can see the L2 cache is highest.this is important cause frequency is not the most important

Edited by Shenmue, 30 December 2012 - 04:43 PM.


#23 Nickos-V

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Posted 30 December 2012 - 08:10 PM

But there are other sources like a new tablet with a A31 clocked at 1.6 ghz and most sources tells us that clockspeed is 1.3 ghz

Thanks for sharing! Very nice find.

I have seen two A31 tablets and clock speeds were 1.2 & 1.3 GHz. I expect many to be 1.3 GHz for A31. RK3188 says 1.8 GHz but I need to see some actual tablets to see if they will clock that high.

Cortex A7 @ 40nm supports top speed of 1.5 GHz. Though with quads, they usually drop 200 MHz off the speed to decrease heat. ie. 1.3 GHz for quad.

Cortex A9 @ 40nm, top speed of 1.5 GHz. Though RK3066 was still working well at 1.6 GHz. ie. going past spec.

Cortex A9 @ 28nm supports top speed of 2 GHz. With quad, drop 200 MHz & max would be 1.8 GHz but could go as low as 1.6 GHz.


Also, the bigger L1 cache should help out a little too. L2 cache appears to be 1 MB for all of them. Though L1 cache cannot compete against higher clock speeds & Cortex A9 architecture which will give more CPU computing power to RK3188. But how RK3188 will do in 3D gaming performance is another matter. ie. CPU performance is one thing and GPU performance is another.

Looks like I guessed right about RK3188 w/Mali400-MP4! =)

We still have to see GLBenchmark tests to figure out which chip has the better GPU performance and what the difference is between them. Gaming tests will tell us for sure which is the better quad core chip to buy.

PS, which tablet has A31 @ 1.6 GHz?

Edit: I read the whole story and saw nothing to prove that RK3188 is using Mali400-MP4. I believe the author maybe guessing from what I could tell.

Edited by Nickos-V, 30 December 2012 - 08:29 PM.


*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#24 wurstt

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Posted 31 December 2012 - 10:25 AM

PS, which tablet has A31 @ 1.6 GHz?



It was a Taipower (Teclast) Tablet, but I can't find the source.
But here is another: http://www.eken.com/gt10v/


By the Way, here is a Review+Benchmark of Onda 812: http://www.igao7.com/1231-vv-v812.html
GPU is as expected kind of powerful. CPU is kind of underwhelming. But there is a comment on the Facebook Page of Pandawill that says there is a antutu score of 15000 from a tablet with A31. That would be almost the same score of my Galaxy Note 10.1.

#25 Nickos-V

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Posted 31 December 2012 - 03:25 PM

It was a Taipower (Teclast) Tablet, but I can't find the source.
But here is another: http://www.eken.com/gt10v/

By the Way, here is a Review+Benchmark of Onda 812: http://www.igao7.com/1231-vv-v812.html

OK. 1.6 GHz quad Cortex A7 is really pushing the limit. Maybe stable or maybe not. Hard to say. 1.3 GHz would be stable and likely 1.4 GHz too. Higher speeds than those could start getting unstable.

Antutu 3 results do not seem that great compared to my N80 (RK3066 w/Mali400MP4 @ 266 MHz).

V812 (1.0 GHz)         N80 (1.6 GHz)
RAM:       1521                   2006
CPU INT:   2888                   2508
CPU FLOAT: 1838                   1841
2D:        1087                   1302
3D:        4678                   3909
SD WRITE:    67.1 MB/s               3.5 MB/s

TOTAL:    12885                  12351

I included SD write because very big difference in that one test between the two tablets. I also prefer way more GLBenchmark over Antutu for 3D GPU benches because much more thorough test. But, let's say Antutu has the 2D & 3D right, then A31 is only slightly better than RK3066 overall.

Both tablets are both 1024x768 making sure resolution does not affect final results.

RK3188 will very likely come out with Mali400MP4 @ 400 MHz or "maybe" better GPU. That means, even better scores for GPU + CPU in Antutu than my N80 above.

Edited by Nickos-V, 01 January 2013 - 09:11 PM.


*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#26 wurstt

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Posted 01 January 2013 - 04:38 PM

Onda v812 is only clocked at 1ghz.
From Onda Forum:
Posted Image
source: http://www.ondabbs.c...217318-1-1.html

Another huge test: http://www.ondabbs.c...217323-1-1.html

Here a A31 (probably v812-->resolution) is clocked to 1.2 ghz, but it seems to be very hot.
http://bbs.imp3.net/...876156-1-2.html

Antutu: 14253
That was my hope for this tablet to be the standard performance.

Edited by wurstt, 01 January 2013 - 06:11 PM.


#27 Nickos-V

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Posted 01 January 2013 - 09:24 PM

Onda v812 is only clocked at 1ghz.

Here a A31 (probably v812-->resolution) is clocked to 1.2 ghz, but it seems to be very hot.
http://bbs.imp3.net/...876156-1-2.html

Antutu: 14253
That was my hope for this tablet to be the standard performance.

OK. I changed V812 from 1.3 GHz to 1.0 GHz in my previous post. I had read that V812 was coming with 1.3 GHz but that link says only 1.0 GHz clock speed.

1.0 GHz is too low. 1.3 GHz would have been good. Looks like A31 may have heat issues to only clock at 1 GHz. It now seems like RK3188 maybe the better ARM chip to go with though still waiting for some testing to be sure.

I also was hoping V812 would come out with 1.3 GHz clock speed. At 1.0 GHz, it is only slightly better than RK3066. ie. not worth the upgrade.

*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#28 sukanime

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Posted 01 January 2013 - 09:59 PM

OK. 1.6 GHz quad Cortex A7 is really pushing the limit. Maybe stable or maybe not. Hard to say. 1.3 GHz would be stable and likely 1.4 GHz too. Higher speeds than those could start getting unstable.

Antutu 3 results do not seem that great compared to my N80 (RK3066 w/Mali400MP4 @ 266 MHz).

V812 (1.0 GHz)         N80 (1.6 GHz)
RAM:       1521                   2006
CPU INT:   2888                   2508
CPU FLOAT: 1838                   1841
2D:        1087                   1302
3D:        4678                   3909
SD WRITE:    67.1 MB/s               3.5 MB/s

TOTAL:    12885                  12351

I included SD write because very big difference in that one test between the two tablets. I also prefer way more GLBenchmark over Antutu for 3D GPU benches because much more thorough test. But, let's say Antutu has the 2D & 3D right, then A31 is only slightly better than RK3066 overall.

Both tablets are both 1024x768 making sure resolution does not affect final results.

RK3188 will very likely come out with Mali400MP4 @ 400 MHz or "maybe" better GPU. That means, even better scores for GPU + CPU in Antutu than my N80 above.


Hmmm, CPU performance not good, i hope it will be twice much better than my Ainol Novo7 Aurora 2 (Amlogic 8726-MX).
I just Run test with Antutu 3.0.3 with My Aurora 2, and Antutu score for CPU:
RAM:                   1627
CPU Interger:          2093
CPU FLoat-point:       1444
2D graphic: [600x1024]  702
3D graphic: [600x1024] 2519
Right now , i need new tablet that can play Anime 10bit (Hi10p), so this Allwinner A31 will be not powerfull to play it. :(


Edit 03 Jan 2013:
Ainol Novo10 Hero II with Actions ATM7029 Quad-Core 1.5GHz is out now, there is review in here http://blog.worse site ever/index.php/tablet-pc/review-of-ainol-novo-10-hero-ii-quad-core-tablet-pc-10-1-inch-ips-android-4-1/
CPU Score much better than Allwiner A31, here Antutu Score according that review:
RAM:                   2702
CPU Interger:          3610
CPU FLoat-point:       2837
2D graphic: [600x1024]  912
3D graphic: [600x1024] 1774

Now, i need to know RK3188 review to get new tablet.


Edit 26 January 2014
Here more comparison with Exynoss 4412 @1,4Ghz on Ramos W30HD with Retina Display.
RAM:                   3174
CPU Interger:          4407
CPU FLoat-point:       3179
2D graphic: [1200x1848]  882
3D graphic: [1200x1848] 2184

Posted Image

source: http://www.kaskus.co...1200-resolution

ps: sory if this OOT, i just want to show comparison

Edited by sukanime, 26 January 2013 - 09:27 AM.

Ainol Novo7 Aurora I + Custom ROM CM9 = SoC Allwinner A10 SingleCore Cortex A8 + 1GB DDR3 + 7" IPS ( already sold it )
Ainol Novo7 Aurora II + Official ROM 0626 = SoC Amlogic 8726-MX DualCore Cortex A9 + 1GB DDR3 + 7" IPS ( using it now )
Asus Google Nexus 7 16GB WiFi + Official ROM Nakasi JWR66Y = SoC Tegra 3 Quad Core @1,2Ghz + 1GB DDR3 + 7" IPS Coring Glass ( using it now )

#29 Droidgirlsz

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Posted 04 January 2013 - 10:01 PM

Looks very powerful. looking forward the Onda V972 witch powered by Allwinner A31 coming soon.

#30 Nickos-V

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Posted 05 January 2013 - 12:14 AM

Hmmm, CPU performance not good, i hope it will be twice much better than my Ainol Novo7 Aurora 2 (Amlogic 8726-MX).

Now, i need to know RK3188 review to get new tablet.

I don't mind chip compares. How else to know which is better than the other without that???

#1. A7 has weaker CPU performance compared to A9. A7 is very close to A8 at same clock speed.
#2. Tests above were done on A31 tablet with 1 GHz clock speed. I had seen Onda tablets say 1.3 GHz. Now I have seen 1.5 GHz. No idea what the final clock speed will be for V812. ie. at 1.5 GHz should be great or excellent. At 1.3 will be very good or great.

Notice how ATM7029 has weaker 2D & 3D performance. That is what most of us care about. The GPU performance for gaming. =) ie. Mc-Bub even says they use GC1000 for the GPU. Not Mali400 like some other sites & tablet makers have said. Also, in Vellamo, HTML 5 score of 859 (1668 on N80) & 251 for Metal (527 for N80) are on the very low side for a quad core ARM chip!!!

The A31 (@ 1 GHz) compared to RK3066 (@ 1.6 GHz) has very strong SD write & 3D. Good 2D. Same FPU performance. Slightly higher integer performance. But the A31 is running at only 1 GHz compared to 1.6 GHz for RK3066. Get A31's clock up to 1.5 GHz and then see what happens. =) Also, the ATM7029 tablet is running at 1.5 GHz. So, ATM7029 gets 500 MHz more per CPU core. ie. potential for 2 GHz more

I can finally say that I am unimpressed with ATM7029 and will avoid that chip for sure!!!! It offers strong CPU but very weak GPU because went with Vivante GC1000 according to Mc-Bub site & the benchmark testing proves not Mali400MP4 either. Scores are low in Antutu 2D & 3D and Vellamo too.

For Hi10p, which many of us will not do, you may need strong CPU performance. I cannot say if that will help or not since the video is decoded by the VPU. A better VPU would certainly help though.


PS, A31 kicked 8726-MX's butt in terms of 3D performance (4678 vs 2519) and even did better in 2D too (1087 vs 702). ie. stronger GPU results should give much better FPS for 3D & 2D gaming with A31. It even outperforms RK3066 on the 3D side but not on the 2D.

I also want to see RK3188 review too. But also, A31 @ 1.3-1.5 GHz because 1 GHz was way too low to compare against. Cortex A7 quad should run stable at 1.3 GHz. Only reason to run it at 1 GHz is if AllWinner chip design is not good and has heat issues. Hoping that is not the case.

Edited by Nickos-V, 05 January 2013 - 11:09 AM.


*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#31 Nickos-V

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Posted 05 January 2013 - 12:31 AM

Mc-Bub says 1.5 GHz for ATM7029 but Antutu says 1.2 GHz for testing. Not sure what to make of that.

Edited by Nickos-V, 05 January 2013 - 12:32 AM.


*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#32 janesh

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Posted 05 January 2013 - 07:36 AM

I think i will receive both chipsets next monday. My onda v812 just landed im Amsterdam, the Hero ii on DHL plane between hongkong and Leipzig.
On order, nothing, and am i am finished with Chinese cpu's, i prefer my exynos devices.
Favorites, in order of use, Samsung galaxy note 8 inch, Ramos W42, Ployer Momo11 quad exynos 4412.
Sold last months, PiPo U1, Teclast P85, PiPo S2, Teclast P85HD, Cube mini U30GT, Yuandao Vido N80IPS, Ainol Novo 10 Hero ii: very bad, Ployer Momo12, Onda V812, Yuandao Vido N80 RK3188, Teclast P88, Google Nexus 7-8Gb, PiPo M8pro RK3188, Chuwi V88 RK3188, Samsung galaxy tab 7.7, Ployer Momo8 IPS, Yuandao Window N70, BB playbook.
And: You know we all became mathematicians for the same reason: we were lazy.

#33 Nickos-V

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Posted 05 January 2013 - 02:02 PM

I think i will receive both chipsets next monday. My onda v812 just landed im Amsterdam, the Hero ii on DHL plane between hongkong and Leipzig.

OK. Let us know the real CPU clock speeds.

A31 tablets are saying 1.3/1.4 GHz speed but Antutu is showing 1 GHz instead. ATM7029 is saying 1.5 GHz but Antutu is showing 1.2 GHz.

In the past, AllWinner would say 1.5 GHz for their A10 when in fact it shipped only at 1 GHz. 1.5 GHz was the maximum speed A8 chip could reach but A10 ran too unstable at that speed. So, most A10s shipped at 1 GHz and some even at 1.2 GHz.

In other words, I believe A31 tablets are clocked at 1 GHz & ATM7029 at 1.2 GHz.

My N80 is 1.6 GHz and shows up as 1608 MHz in Antutu. There are no differences between stated and actual clock speeds.

*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#34 janesh

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Posted 05 January 2013 - 04:18 PM

Oke Nickos, I think you are right about the allwinner A10. Though I owned never a device with this chip, I also allways read as you are saying.
Concerning the ATM7029, I must say the antutu benchmark on this Chinese site, ainol forum, is showing 1500 MHz(×4) and a score 14456.
This test is more than the 12423 antutu score in the Mac bub blog review.

Comparing this with my momo12 and P88, antutu benchmark is listing 1602 MHz(×4) for momo12, and 1512 MHz(×2) for the teclast P88 and they both score about 11400 and 11600. The higher clocked momo12 slightly better.

I will see and post my experience next Monday, they both arrived in Europe, (Amsterdam and Leipzig)

Later.

Edited by janesh, 05 January 2013 - 06:20 PM.

On order, nothing, and am i am finished with Chinese cpu's, i prefer my exynos devices.
Favorites, in order of use, Samsung galaxy note 8 inch, Ramos W42, Ployer Momo11 quad exynos 4412.
Sold last months, PiPo U1, Teclast P85, PiPo S2, Teclast P85HD, Cube mini U30GT, Yuandao Vido N80IPS, Ainol Novo 10 Hero ii: very bad, Ployer Momo12, Onda V812, Yuandao Vido N80 RK3188, Teclast P88, Google Nexus 7-8Gb, PiPo M8pro RK3188, Chuwi V88 RK3188, Samsung galaxy tab 7.7, Ployer Momo8 IPS, Yuandao Window N70, BB playbook.
And: You know we all became mathematicians for the same reason: we were lazy.

#35 sukanime

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Posted 06 January 2013 - 08:48 AM

I don't mind chip compares. How else to know which is better than the other without that???

#1. A7 has weaker CPU performance compared to A9. A7 is very close to A8 at same clock speed.
#2. Tests above were done on A31 tablet with 1 GHz clock speed. I had seen Onda tablets say 1.3 GHz. Now I have seen 1.5 GHz. No idea what the final clock speed will be for V812. ie. at 1.5 GHz should be great or excellent. At 1.3 will be very good or great.

Notice how ATM7029 has weaker 2D & 3D performance. That is what most of us care about. The GPU performance for gaming. =) ie. Mc-Bub even says they use GC1000 for the GPU. Not Mali400 like some other sites & tablet makers have said. Also, in Vellamo, HTML 5 score of 859 (1668 on N80) & 251 for Metal (527 for N80) are on the very low side for a quad core ARM chip!!!

The A31 (@ 1 GHz) compared to RK3066 (@ 1.6 GHz) has very strong SD write & 3D. Good 2D. Same FPU performance. Slightly higher integer performance. But the A31 is running at only 1 GHz compared to 1.6 GHz for RK3066. Get A31's clock up to 1.5 GHz and then see what happens. =) Also, the ATM7029 tablet is running at 1.5 GHz. So, ATM7029 gets 500 MHz more per CPU core. ie. potential for 2 GHz more

I can finally say that I am unimpressed with ATM7029 and will avoid that chip for sure!!!! It offers strong CPU but very weak GPU because went with Vivante GC1000 according to Mc-Bub site & the benchmark testing proves not Mali400MP4 either. Scores are low in Antutu 2D & 3D and Vellamo too.

For Hi10p, which many of us will not do, you may need strong CPU performance. I cannot say if that will help or not since the video is decoded by the VPU. A better VPU would certainly help though.


PS, A31 kicked 8726-MX's butt in terms of 3D performance (4678 vs 2519) and even did better in 2D too (1087 vs 702). ie. stronger GPU results should give much better FPS for 3D & 2D gaming with A31. It even outperforms RK3066 on the 3D side but not on the 2D.

I also want to see RK3188 review too. But also, A31 @ 1.3-1.5 GHz because 1 GHz was way too low to compare against. Cortex A7 quad should run stable at 1.3 GHz. Only reason to run it at 1 GHz is if AllWinner chip design is not good and has heat issues. Hoping that is not the case.



Mc-Bub says 1.5 GHz for ATM7029 but Antutu says 1.2 GHz for testing. Not sure what to make of that.




Yes, alot of people looking for Gaming performance, but some people like me (and some of my anime fans friend), looking CPU performance for playing Anime 10bit (Hi10p).
About Hi10p, the only SoC that have good performance is Tegra3 overclocked to 1,5Ghz, i read this in XDA Forum, but Tegra3 is expensive, so not for me.

About A31, i have read your post. :)

Now looking forward for RK3188, if this much better than Actions Semi or much better than Tegra3... :)
A31 with 1,3Ghz perhaps not much better for playing Hi10p, but i don't know if no one test it.

Edited by sukanime, 06 January 2013 - 08:48 AM.

Ainol Novo7 Aurora I + Custom ROM CM9 = SoC Allwinner A10 SingleCore Cortex A8 + 1GB DDR3 + 7" IPS ( already sold it )
Ainol Novo7 Aurora II + Official ROM 0626 = SoC Amlogic 8726-MX DualCore Cortex A9 + 1GB DDR3 + 7" IPS ( using it now )
Asus Google Nexus 7 16GB WiFi + Official ROM Nakasi JWR66Y = SoC Tegra 3 Quad Core @1,2Ghz + 1GB DDR3 + 7" IPS Coring Glass ( using it now )

#36 Nickos-V

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Posted 06 January 2013 - 10:16 AM

Yes, alot of people looking for Gaming performance, but some people like me (and some of my anime fans friend), looking CPU performance for playing Anime 10bit (Hi10p).

My RK3066 tablet seems to play Anime 720p hi10p well. See my post over here for info:
http://www.slatedroi...ime-720p-hi10p/

*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#37 sukanime

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Posted 06 January 2013 - 11:19 PM

My RK3066 tablet seems to play Anime 720p hi10p well. See my post over here for info:
http://www.slatedroi...ime-720p-hi10p/


Thanks, i will discuss Anime in there.
Ainol Novo7 Aurora I + Custom ROM CM9 = SoC Allwinner A10 SingleCore Cortex A8 + 1GB DDR3 + 7" IPS ( already sold it )
Ainol Novo7 Aurora II + Official ROM 0626 = SoC Amlogic 8726-MX DualCore Cortex A9 + 1GB DDR3 + 7" IPS ( using it now )
Asus Google Nexus 7 16GB WiFi + Official ROM Nakasi JWR66Y = SoC Tegra 3 Quad Core @1,2Ghz + 1GB DDR3 + 7" IPS Coring Glass ( using it now )

#38 Nickos-V

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Posted 13 January 2013 - 04:26 PM

Yesterday I looked at a livestream of a skating match from the website of the dutch broadcasting company, the hero ii very very bad, the V812 very smooth.

I think the A31 has potency, I notice some lag, bit more as RK3066, but I think in overall use a bit faster than the RK3066, and video playback is In my view better as Mali 400.

The A31 has slightly better performing 3D GPU compared to Mali400MP4 in RK3066. Both Antutu & GLBenchmark show this. Also, A31 might have better VPU too? AllWinner VPU in A10 was really great.

The only let down for A31 is they put clock speed too low. 1.4 or 1.3 GHz would have been ideal speed to have this chip run at. Even 1.2 GHz would have been OK too. Android OS supports multi-core so moving icons around, switching screens, starting apps, etc. should be fairly quick and smooth with this chip. But, many apps tend to be dual or single threaded and will really just use 2 CPU cores. ie. For apps: 2 A7 cores @ 1 GHz (A31) vs 2 A9 cores @ 1.6 GHz (RK3066). Most apps do not need lots of CPU power anyways so A31 can get away with having less.

The A31 has a minor disadvantage because A7 architecture but also from the big difference in clock speed with RK3066. A higher clock speed for A7 would have made it a real winner. I think going 40nm was another mistake. They should have done 28nm (like RK3188) or 32nm (like Exynos Quad). It would have allowed them to hit higher clock speeds. Though I can tell they have an issue with 40nm too. In theory, 40nm should work to 1.5 GHz for dual & 1.3 GHz for quad. So why does AllWinner only use 1 GHz speed for A31??? Because chip design maybe not that great. I heard the A31 starts getting unstable above 1 GHz clock speeds. Unfortunate because A31 chip had potential to be really great and now will only be slightly better than RK3066. ie. minor upgrade (in GPU) going from RK3066 to A31 but likely a large downgrade on CPU side because many apps only dual threaded.

I know that RK3188 will be much stronger on the CPU side but curious to see how much better the GPU ends up being. RK3188 is looking like the better choice over A31 but still have to wait about 3 months for tablets to get released and tested.

Edited by Nickos-V, 13 January 2013 - 04:28 PM.


*MINIX NEO X5 (RK3066) - OK. Not fun because uses mouse cursor.
*YUANDAO N80 DUAL (RK3066) - Very good
*CUBE U30GT (RK3066)- Defective; buttons broke in 2-3 weeks; Bad quality control!!! I will never buy a Cube again!!! - Very good while working
*WOPAD I7 (RK2918)- About OK. Sluggish because has weaker ARM chip (RK2918) & less RAM (512 MB).

#39 munka

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Posted 19 January 2013 - 03:28 AM

The A31 has slightly better performing 3D GPU compared to Mali400MP4 in RK3066. Both Antutu & GLBenchmark show this. Also, A31 might have better VPU too? AllWinner VPU in A10 was really great.

The only let down for A31 is they put clock speed too low. 1.4 or 1.3 GHz would have been ideal speed to have this chip run at. Even 1.2 GHz would have been OK too. Android OS supports multi-core so moving icons around, switching screens, starting apps, etc. should be fairly quick and smooth with this chip. But, many apps tend to be dual or single threaded and will really just use 2 CPU cores. ie. For apps: 2 A7 cores @ 1 GHz (A31) vs 2 A9 cores @ 1.6 GHz (RK3066). Most apps do not need lots of CPU power anyways so A31 can get away with having less.

The A31 has a minor disadvantage because A7 architecture but also from the big difference in clock speed with RK3066. A higher clock speed for A7 would have made it a real winner. I think going 40nm was another mistake. They should have done 28nm (like RK3188) or 32nm (like Exynos Quad). It would have allowed them to hit higher clock speeds. Though I can tell they have an issue with 40nm too. In theory, 40nm should work to 1.5 GHz for dual & 1.3 GHz for quad. So why does AllWinner only use 1 GHz speed for A31??? Because chip design maybe not that great. I heard the A31 starts getting unstable above 1 GHz clock speeds. Unfortunate because A31 chip had potential to be really great and now will only be slightly better than RK3066. ie. minor upgrade (in GPU) going from RK3066 to A31 but likely a large downgrade on CPU side because many apps only dual threaded.

I know that RK3188 will be much stronger on the CPU side but curious to see how much better the GPU ends up being. RK3188 is looking like the better choice over A31 but still have to wait about 3 months for tablets to get released and tested.


The Arm A7 cores are a 8 stage pipeline, this is fairly short compared to the A9 which is between 8 and 11 allowing a higher clock speed. The A7 is designed entirely to save power, yet in this instance is a complete let down as most owners are reporting higher power use than many competing A9 chips like the Amlogic or Rockchip dual core variants that perform similar at lower power. Unless drivers get better with time, and power saving noteably improves I think I'll avoid the A31 for now. Shame I was hoping for this device to replace my Aurora 2 but its just not an upgrade without a noticably longer battery life.

#40 pakron

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Posted 22 January 2013 - 05:46 PM

Thanks for the info. Now have to wait what GPU is in RK3188.