Database Users

Mystery (probably) solved; how Samsung pulls off its GPU magic.

Edit: TL;DR VERSION: 128 of that 512 megs of RAM in ur Epic is leet special-sawce Samsung RAM that pwns other RAMs, and makes ur GPU make moar trianglez in ur gamez.
Forgive me folks, I'm lazy, so I'm posting this more or less verbatim from what I posted in my blog, with a few minor tweaks. It's long and probably boring, so you have my apologies in advance.
Despite my efforts to pull myself away from ARM architecture, Android, and specifically, the mysteries surrounding the Hummingbird processor, I can never really extract myself. One of these days I'll get around to obsessing over something else (hopefully career-related) but until then, I'll let you know what I think I've uncovered as the solution to how Samsung solved the GPU bandwidth issue (which I puzzled over in my original Hummingbird vs. Snapdragon article.)
There have been a few opportunities where I've had to step in and correct people when they post that a Galaxy S phone has only ~320 megs of RAM. It's an error I see made frequently when people use Android system info applications that can only see the 320 megs of volatile memory, despite the fact that the phone does actually contain 512 megs of RAM. We see it happen every time a new Galaxy S phone is leaked, even the Nexus S.
The explanation for this has always been that a certain amount of memory have been "reserved" by Samsung for the Android OS, and that memory is not visible nor available to applications. Despite this, I've never been able to figure out exactly how the system provides the 12.6 GB/sec of memory bandwidth it (theoretically) needs to push out 90 million triangles/sec with the PowerVR SGX540 GPU.
I'm not quite sure how it happened, but in my meanderings across the interwebs, I ran across the following image on ODROID.com of the block diagram of the S5PC110 that they use for their developer board.
(Edit: Image-Shacked... ODROID didn't appreciate me hot-linking their image. Whoops. Use the ODROID.com link above to see the original.)
Careful observation of the POP (Package-On-Package, or "Stacked" circuits) module on the left-hand side shows 384 MB of LPDDR1 and 128MB of OneDRAM, a term I'd noticed on S5PC110 documentation on the list of supported technologies. I'd assumed that it wasn't used. I'd already determined that even though the Hummingbird supports LPDDR2, it only supports it at 400 Mbps transfer rate (which LPDDR1 is capable of) and, with an x32 bus, only allows for 1.6 GBps data bandwidth, a far cry from the 12.6 GBps needed.
So what is this OneDRAM? According to Samsung, "OneDRAM is a fusion memory chip that, can significantly increase the data processing speed between a communications processor and a media processor in mobile devices," and, "...this results resulting in a five-fold increase in the speed of cellular phone and gaming console operations, longer battery life and slimmer handset designs." (Sic.)
Hear hear! 5 times 1.6 GBps still doesn't equal 12.6, but the 12.6 number is a something I arrived at using a lot of assumptions (4.2 GBps bandwidth needed by the PowerVR SGX540 to perform 28 million triangles per second, multiplied times 3 to make ~90 million triangles per second). I'm satisfied that the OneDRAM is that holy grail memory I've been looking for.
Now, how to prove that it actually exists inside my Epic 4G? Remember, the S5PC110 Hummingbird doesn't come with memory built-in; that's something that gets stacked on when the phone is built. The ODROID guys could very well be using a completely different configuration; though that ~320 megs showing up over and over in Android system info apps hardly seems like a coincidence, assuming the difference between 384 and 320 is actually reserved memory for the OS' own system applications. The OneDRAM on the other hand would be reserved primarily for hardware use, such as the GPU as Samsung earlier suggested.
I turned to one of my Android developer acquaintences, noobnl of xda-developers.com. When I showed him what I've run across, (hoping to see if he'd heard of this before, as he has a good handle on Epic hardware) he told me that I had made a good find. He also pasted some kernel code that clearly referenced OneDRAM, proving that the Epic 4G contains this technology.
So there you go folks. The secret is out. The Galaxy S phones are likely able to achieve such amazing graphics performance via a 128 MB Samsung-proprietary high-speed hybrid memory solution. The remaining 384 megs of memory is plain-jane LPDDR1. The total is the promised 512 megs, and honestly, I wouldn't trade the OneDRAM for 128 megs more of LPDDR1 available application memory, but it's interesting how Samsung has kept the OneDRAM solution so quiet. It's likely enjoying the current GPU supremacy of the Galaxy S phones, unfortunately come Cortex-A9, LPDDR2 memory (> 400 Mbps), and dual-channel memory controllers, they will be back on a level playing field. Who could blame them for setting aside Orion and picking up NVIDIA's Tegra 2 SoCs for their next-gen smartphones? It's a fast-moving industry out there, particularly when you don't have Intrinsity any longer as your ace-in-the-hole. Curse you, Apple.
PS - Some of you guys on here know more about this **** than I do. Please feel free to offer suggestions, corrections, and jeers. Though I'm hoping for less of the latter.

Dude what?
Sent from my SGH-T959D using XDA App

Mannnnnnn ....I had a hunch it worked like that
thanks for clearing this up Im glad im not the only one that figured this out!

Are you not compensating for TBDR memory efficiency?

Interesting. Could also complicate porting newer Android versions, at least wih the same efficiency.

I pretend I understood all that you said..and say...Voila..FINALLY!

Yeah I've seen documentation saying the Galaxy S phones have 4Gb of RAM. 1Gb of which is OneDRAM and 3Gb is LPDDR (Idk version). Now, tell us why ODROID and the block diagram can do 1080p and we can't.
EDIT:

thephawx said:
Are you not compensating for TBDR memory efficiency?
Click to expand...
Click to collapse
I just pulled my information from some raw data about the Intel GMA500 (which is an SGX540 disguised as Intel) running at 200 MHz. I would assume the 4.2 GB/s bandwidth needed assumes TBDR is being used.
It's a shaky line of reasoning though. Wish I had some more hard data on the SGX540, and more specifically, the clock rate it runs at in the Epic.
arashed31 said:
Yeah I've seen documentation saying the Galaxy S phones have 4Gb of RAM. 1Gb of which is OneDRAM and 3Gb is LPDDR (Idk version). Now, tell us why ODROID and the block diagram can do 1080p and we can't.
EDIT:
Click to expand...
Click to collapse
Yeah, I could swear I've seen those numbers somewhere but I can't for the life of me find it.
As for the 1080p, that's a good catch; interesting. And, now that I look closer, WiFi doesn't have N support, though I suppose it's possible they used a different WiFi chip.

delete, double post.

Interesting...I guess it makes sense somewhat...though with that much processing why would they then set an FPS limit? is it suppose to be their way of saving energy?
As for 1080p..we have specifications for it..If i were to guess we just don't have the proper drivers...video decoding is done via the ARM Neon..so if anything 1080p would play slow..but it doesn't play at all...so its either locked out intentionally..or the driver is not configured to...I mean it can handle 720p at [email protected] reason why it can't handle 1080p at lower settings...

Wow.. My brains are like oh my gawds!
Interesting tho
Sent from my SPH-D700 using Tapatalk

Another thing. If you look at the Bluetooth certification site you'll see the Samsung Epic is certified for Bluetooth 3.0. Even though the chip in there is a Broadcomm chip that only supports Wireless N and Bluetooth 3.0.
gTen said:
Interesting...I guess it makes sense somewhat...though with that much processing why would they then set an FPS limit? is it suppose to be their way of saving energy?
As for 1080p..we have specifications for it..If i were to guess we just don't have the proper drivers...video decoding is done via the ARM Neon..so if anything 1080p would play slow..but it doesn't play at all...so its either locked out intentionally..or the driver is not configured to...I mean it can handle 720p at [email protected] reason why it can't handle 1080p at lower settings...
Click to expand...
Click to collapse
Video decoding is on the processor? WHAT. THE. HELL. SAMSUNG.

Sounds like you did your homework, i'll buy it. Thanks for sharing. I'll take the fast vid over ram too

tmuka said:
Sounds like you did your homework, i'll buy it. Thanks for sharing. I'll take the fast vid over ram too
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Click to collapse
Homework, yes... but I'd really like to see an ARM engineer affirm it.
gTen said:
Interesting...I guess it makes sense somewhat...though with that much processing why would they then set an FPS limit? is it suppose to be their way of saving energy?
As for 1080p..we have specifications for it..If i were to guess we just don't have the proper drivers...video decoding is done via the ARM Neon..so if anything 1080p would play slow..but it doesn't play at all...so its either locked out intentionally..or the driver is not configured to...I mean it can handle 720p at [email protected] reason why it can't handle 1080p at lower settings...
Click to expand...
Click to collapse
Yeah, I just actually took a look at the S5PC110 User Manual and sure enough, 1080p encoding / decoding at 30 FPS is showing supported on the block diagram:
"1080p 30 fps MFC
Codec H.263/H.264/MPEG4
Decoder MPEG2/VC-1/Divx"
But then, directly below the block diagram, the following is shown:
"Multi Format Codec provides encoding and decoding of MPEG-4/H.263/H.264 up to [email protected] and
decoding of MPEG-2/VC1/Divx video up to [email protected] fps"
That's an odd discrepancy, particularly for an official Samsung processor owner's manual.
Also worth mentioning is that that manual makes no mention of OneDRAM in the memory subsystem breakdown where OneNAND, LPDDR1, LPDDR2, and DDR2 support are outlined, however, it's clearly listed as a supported memory type in the block diagram, and later throughout the manual. Hmm.
Sent from my SPH-D700 using XDA App

Quad-core or 2gb ram?

In real phone scenario what we could benefit more? Will a quad-core be faster the 2gb of ram? Or will a 2gb will perform better against quad-core?
Pocketnow did a video between the gs2 and gs3 and both were opening apps really quick, they were really close on browsing, gaming. Do you think the 2gb will make a difference on the phone compare to the international? What are your thoughts?
Sent from my SPH-D700 using XDA

2GB will help with multitasking while the faster processor will help with gaming and to a degree, faster apps.

If it were an iPhone, then the quad core would be much better because apps will actually make use of the amazing gpu. In android, I doubt there will be an app released in the next year or two that realistically benefits from the quad core's gpu vs the dual core's.
Both the dual and quad core will have all of the software optimizations Samsung has done for web browsing. The 2gb memory is probably overkill at this point, but in theory it means that apps will never close in the background since there will be no need to free up new memory.
Sent from my SPH-D700 using XDA

lepapirriky said:
In real phone scenario what we could benefit more? Will a quad-core be faster the 2gb of ram? Or will a 2gb will perform better against quad-core?
Pocketnow did a video between the gs2 and gs3 and both were opening apps really quick, they were really close on browsing, gaming. Do you think the 2gb will make a difference on the phone compare to the international? What are your thoughts?
Sent from my SPH-D700 using XDA
Click to expand...
Click to collapse
Here's my thoughts:
1. Still on the Epic 4G I've never had any real lag.
2. Lack of ram can stall a device, but an excess of ram will not make it faster.
3. Mobile quad-cores are new and untested.
4. Android is not designed for quad-core processors.
5. The dual-core US version should easily match the quad-core international.
6. More ram means more easily multitasking/app-switching.
Check out this article.
muyoso said:
If it were an iPhone, then the quad core would be much better because apps will actually make use of the amazing gpu.
Click to expand...
Click to collapse
Amazing gpu? The Galaxy S I opposed the iPhone 4. The Epic 4G has a better gpu than the iPhone 4, the PowerVR SGX 540 vs the iPhone's PowerVR SGX 535. Just thought I'd mention it since you're in an Epic 4G forum.

RandomKing said:
Here's my thoughts:
1. Still on the Epic 4G I've never had any real lag.
2. Lack of ram can stall a device, but an excess of ram will not make it faster.
3. Mobile quad-cores are new and untested.
4. Android is not designed for quad-core processors.
5. The dual-core US version should easily match the quad-core international.
6. More ram means more easily multitasking/app-switching.
Check out this article.
Amazing gpu? The Galaxy S I opposed the iPhone 4. The Epic 4G has a better gpu than the iPhone 4, the PowerVR SGX 540 vs the iPhone's PowerVR SGX 535. Just thought I'd mention it since you're in an Epic 4G forum.
Click to expand...
Click to collapse
1. Well the whole android cant handle 4 cores i think is false because its derived from Linux and i know those who use 4,6,8 core processor's and use Linux. so if android isn't im sure its all in code is all.
2. More Ram does mean things will run much faster. For Example: playing gta 4 with 4GB of DDR3 Ram @ 1333MHz plays decent but my pc setup that plays gta 4 with 8Gb of DDR2 Ram @ 1333MHz plays faster and loads faster but GPU does factor those speeds too so, in a sense you cant bottleneck them.

Extra RAM. It's going to be a while before the apps/software catches up with having two more cores. Meanwhile even old stuff can benefit from extra memory. Also see it as more future proof as you won't get the lame ass excuses from Samsung about it not having enough RAM to run whatever the latest release of Android is like we got with ICS and the Epic 4G.

XxLostSoulxX said:
1. Well the whole android cant handle 4 cores i think is false because its derived from Linux and i know those who use 4,6,8 core processor's and use Linux. so if android isn't im sure its all in code is all.
2. More Ram does mean things will run much faster. For Example: playing gta 4 with 4GB of DDR3 Ram @ 1333MHz plays decent but my pc setup that plays gta 4 with 8Gb of DDR2 Ram @ 1333MHz plays faster and loads faster but GPU does factor those speeds too so, in a sense you cant bottleneck them.
Click to expand...
Click to collapse
You've misunderstood. Android can use 4 cores, of course. What it can't do is use them effectively in a way that creates any sort of advantage. But just as a mention, being derived from Linux source does not make it a full-fledged Linux OS by far.
And on your second point, again, you're comparing to a full PC operating system. Up until now, apps have been designed for phones with far less than 1GB of ram. It really depends on how you use your phone as to how much ram is needed. If you have a video editor running in the background, while playing pandora, and emulating Mario 64 you'll need more than simply browsing the web. But the processor, bus speeds, operating system, etc. all factor into how effectively more ram can be used. For Example: A 32 bit computer can't even use more than 4GB of ram. More ram does not simply mean 'much' more more speed, there are many other limiting factors. You can throw all the ram you want at a netbook, it will never run GTA4.
Off-Topic Edit: I vote 2GB ram over Quad-Core.

I guess then the only thing that will "improve", not that the int'l lacks of, is on the multitasking??
The few videos I saw, they were really fast but that's of course without all the apps that a normal user install. Like I have 38 apps install on my phone and most of the time I open between 9 to 13 apps everyday. Most of the time I have to close it...I guess more for the habit of doing it and of courses need it when playing games.
I read the answer and I kinda feel its true, maybe android is not yet ready for such hardware just yet, does it feels the hardware manufacture is going too fast compare to the software?
Sent from my SPH-D700 using XDA

lepapirriky said:
I guess then the only thing that will "improve", not that the int'l lacks of, is on the multitasking??
The few videos I saw, they were really fast but that's of course without all the apps that a normal user install. Like I have 38 apps install on my phone and most of the time I open between 9 to 13 apps everyday. Most of the time I have to close it...I guess more for the habit of doing it and of courses need it when playing games.
I read the answer and I kinda feel its true, maybe android is not yet ready for such hardware just yet, does it feels the hardware manufacture is going too fast compare to the software?
Sent from my SPH-D700 using XDA
Click to expand...
Click to collapse
There will be improvement between the dual-core, faster processor, and more ram, rest assured!
Although I still recommend closing apps unnecessarily opened to save battery.

2 A15s > 4 A9s.
Also, the A15 use less power. I'd take the 2 GBs of RAM with the newest CPU anyday.
Sent from my Galaxy Nexus using Tapatalk 2

theking_13 said:
2 A15s > 4 A9s. Also, the A15 use less power. I'd take the 2 GBs of RAM with the newest CPU anyday.
Sent from my Galaxy Nexus using Tapatalk 2
Click to expand...
Click to collapse
+9000

RandomKing said:
Here's my thoughts:
1. Still on the Epic 4G I've never had any real lag.
2. Lack of ram can stall a device, but an excess of ram will not make it faster.
3. Mobile quad-cores are new and untested.
4. Android is not designed for quad-core processors.
5. The dual-core US version should easily match the quad-core international.
6. More ram means more easily multitasking/app-switching.
Check out this article.
Amazing gpu? The Galaxy S I opposed the iPhone 4. The Epic 4G has a better gpu than the iPhone 4, the PowerVR SGX 540 vs the iPhone's PowerVR SGX 535. Just thought I'd mention it since you're in an Epic 4G forum.
Click to expand...
Click to collapse
You don't have any lag on our epic 4g's? What ROM are you running? I've tried every rom out there and am friends with several other rooted epic owners, none of our phones are remotely comparable to the modern phones like s2 and above.
I'd love to see a video of you opening and running netflix, facebook, web browsing on chrome and stock, or whatever if you have time because this blows my mind. i'm doing something horribly wrong.

Too bad we don't have a samsung developed a15
I don't know why but I don't like qualcomm chips
Also whenever I hear snapdragon I automatically think worse than hummingbird
Sent from my SPH-D710 using xda premium

I would take the dual core Krait hands down because it is designed from cortex a15. More instruction per clock is better than stacking cores which a phone doesn't even use. I think the 2 gb of ram has more performance advantage.
They also increased the memory bandwidth with new SOC by adding a new dual channel memory controller which the exynos had all along... They fixed alot of the shortcoming of snapdragon processor with the this gen product

gtuansdiamm said:
[...]Also whenever I hear snapdragon I automatically think worse than hummingbird[...]
Click to expand...
Click to collapse
That's because Hummingbirds rape Snapdragons. See the following:
​

Either way if you want LTE at the moment you are stuck with dual core. So the 2GB of RAM is a nice enhancement. The EVO 1x ended up as two models the 1X which is quad core with no LTE and the 1XL which is dual core with LTE.
Sent from my PantechP4100 using xda premium

RandomKing said:
Amazing gpu? The Galaxy S I opposed the iPhone 4. The Epic 4G has a better gpu than the iPhone 4, the PowerVR SGX 540 vs the iPhone's PowerVR SGX 535. Just thought I'd mention it since you're in an Epic 4G forum.
Click to expand...
Click to collapse
Where the hell did the epic4g or the iPhone 4 come into the question? My point was that iPhones actually make use of their gpu's better than android phones do, so the difference between the quad core and the dual core gs3 should be minimal in that regard, at least for a while.
Sent from my SPH-D700 using XDA

noobnl said:
I would take the dual core Krait hands down because it is designed from cortex a15.
Click to expand...
Click to collapse
This is wrong.
The Krait is very much designed from the Cortex A9. While it shares similarities with the A15, it is not quite as powerful.
Krait is about 60% of the way between the A9 and A15.

jnadke said:
This is wrong.
The Krait is very much designed from the Cortex A9. While it shares similarities with the A15, it is not quite as powerful.
Krait is about 60% of the way between the A9 and A15.
Click to expand...
Click to collapse
No, where'd you even get that from? Krait is slightly below an A15, Qualcomm derived their design from it. Yes, its not a true A15 core. But its the best right now in production.
Qualcomm has a license to mess around with ARMs designs and make their own CPUs, not just copy and slap an "A4" on them like Apple does.
Sent from my Galaxy Nexus using Tapatalk 2

theking_13 said:
No, where'd you even get that from? Krait is slightly below an A15, Qualcomm derived their design from it. Yes, its not a true A15 core. But its the best right now in production.
Click to expand...
Click to collapse
Interesting how someone "Likes" wrong information.
http://www.anandtech.com/show/4940/qualcomm-new-snapdragon-s4-msm8960-krait-architecture
Designing a processor takes an extremely long amount of time. A15 was just barely released a few months ago. No way Krait was designed from it.
Now, Krait borrows some features from A15, but it's missing some important features as well. Krait does feature an extended instruction pipeline over the A9 (11 vs 9 cycles), but it's nowhere near as long as the A15 (15 cycles). Strictly speaking, lengthening a pipeline is less work than shortening it, hence Krait was not designed from the A15.
It's more likely Krait is an evolution of the Scorpion than anything.
As far as Apple, they have no place in this conversation, but if you must.... while they do have a "processor-only" license with ARM, they do farm out to a company to change some transistor signaling to make it more power efficient (they later bought them).
2 years ago, Apple bought Freescale, the only remaining PowerPC processor design company. (aside: The defense industry was largely concerned, as they rely on PowerPC for their power-efficient but high-speed applications). Anyhow, I wouldn't be surprised if they have an architecture license now so they can design their own ARM processors, Qualcomm-style. The main advantage would be integrating LTE radios like Qualcomm does.
Coincidentally it takes about 2 years to fully design a processor.

Why only 3.5 GB Ram? Mismanagement of RAM?

So my question for the XDA community is why are only 3.5GB of the 4GB DDR4 available? Is this just poor optimization or mismanagement on Samsung's end?

cepheid46e2 said:
So my question for the XDA community is why are only 3.5GB of the 4GB DDR4 available? Is this just poor optimization or mismanagement on Samsung's end?
Click to expand...
Click to collapse
It's neither mate. It reserves 432mb....so that's 4gb lol
Sent from my SM-G928F using Tapatalk

I don't know about, I have desktops and laptops than run on 4GB, why would a stupid phone need that much ROM.

ilogik said:
I don't know about, I have desktops and laptops than run on 4GB, why would a stupid phone need that much ROM.
Click to expand...
Click to collapse
A PC uses DDR while a mobile uses LPDDR RAM. A PC RAM performance is considerably higher than a power optimized mobile RAM. Also, do consider it's a 64-bit processor, so it will eventually consume more RAM compared to a traditional 32-bit processor due to its 64-bit address width & more.
So a 64-bit PC using 4 GB is equivalent to a mobile running on 4 GB. And so would be the reserved memory.

The Nexus 10 is suppose to have "2GB" of ram, but my Nexus 10 only have "1099"

The Nexus 10 is suppose to have "2GB" of ram, but my Nexus 10 only have "1099"
The Nexus 10 is suppose to have "2GB" of ram, but my Nexus 10 only have "1099"
what is problem?
android 5.1.1

Round it up and it's 2gb

Mine is also showing 1GB of Ram and its runs slow. Is it supposed to have 2?
Sent from my GT-I9505 using Tapatalk

In later software releases, they decided to allocate more of the ram to the video. Search this forum for a more detailed answer if interested.
Sent from my Nexus 6 using Tapatalk

if i recall correctly, about 900mb is reserved for the gpu.

veitograf said:
if i recall correctly, about 900mb is reserved for the gpu.
Click to expand...
Click to collapse
I remember finding this out a few years ago and being pretty upset at the time. The tablet advertises 2GB of RAM, and yet about 1GB of it is only usable for the expected advertising purpose.
It's like me advertising my computer has 12GB of RAM, meanwhile, 4GB of that is dedicated to the GPU (which on it's own isn't really a problem, but it would make more sense to advertise 8GB)

Even then it would still be 12GB.
Let me get a little technical.
If you have an APU based PC, the GPU is on the same die as the processor. So when you use the GPU portion of the APU, it will use the RAM. How much? It depends on the load.
You can still use all of it though, so it isn't a problem. When you aren't using the GPU, all of your RAM is available.

is it there any 64bit rom for this phone?

Turns out Lenovo thought it would be a great idea to use 32bit for any reason.

realy? yet still this question?

LionLorena said:
Turns out Lenovo thought it would be a great idea to use 32bit for any reason.
Click to expand...
Click to collapse
Wrong area to post this. 64 bit? Get a nexus.
Sent from my Moto G4 using Tapatalk

Why is this so absurd to consider? The device have a 64 bit CPU.
Why not use 64bit Android.

LionLorena said:
Why is this so absurd to consider? The device have a 64 bit CPU.
Why not use 64bit Android.
Click to expand...
Click to collapse
If you had searched for a little bit, you would have found that the answer was already made many times and answered in detail.

LionLorena said:
Why is this so absurd to consider? The device have a 64 bit CPU.
Why not use 64bit Android.
Click to expand...
Click to collapse
Because there's effectively no point. The SD617 has a 32-bit width data bus- a 64-bit ROM would actually yield less performance.
Why do you want a 64-bit ROM anyway? There's absolutely nothing 32-bit Android has to offer over 64-bit Android absurdly high RAM amounts (which you'll never find in a budget phone).

Some software I wanna use is 64bit only.
And what would be "absurdly high"?
Because from what I know the advised ram for 64bit is 4gb.

LionLorena said:
Some software I wanna use is 64bit only.
And what would be "absurdly high"?
Because from what I know the advised ram for 64bit is 4gb.
Click to expand...
Click to collapse
No use of 64 bit unless RAM > 4 GB. Beyond 4GB is the point where 64 bit arch starts.
Moreover does moto even release 64 bit source? I heard something similar in the potter forum.

tywinlannister7 said:
No use of 64 bit unless RAM > 4 GB. Beyond 4GB is the point where 64 bit arch starts.
Moreover does moto even release 64 bit source? I heard something similar in the potter forum.
Click to expand...
Click to collapse
Actually 3.7gb (give it or take) is the limit of 32bit.
So any value over that is valid for 64bit

And to be fair the minimum ram for 64bit would be 2gb.
They say 4gb because is where it matters most.
Since 32 can only deal with 4gb.
1 for kernel and 3 for application.

RAM consumption is huge on 64 bits system, take a look to the Nexus 5X... For an Android device running a 64 bits system you need at least 3 GB of RAM, and also, why do you want a 64 bits system if a 32 bits system offers better performance? The 64 bits system just has new type of instructions that are only for more complex calculations that not even the average user will use

LionLorena said:
And to be fair the minimum ram for 64bit would be 2gb.
They say 4gb because is where it matters most.
Since 32 can only deal with 4gb.
1 for kernel and 3 for application.
Click to expand...
Click to collapse
What software do you need to run on Android that requires 64-bit?

joeeboogz said:
Wrong place to post
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Click to collapse
Oh, I'm deeply sorry, it sounded appropriate to post under its own device category.

Johann0109 said:
RAM consumption is huge on 64 bits system, take a look to the Nexus 5X... For an Android device running a 64 bits system you need at least 3 GB of RAM, and also, why do you want a 64 bits system if a 32 bits system offers better performance? The 64 bits system just has new type of instructions that are only for more complex calculations that not even the average user will use
Click to expand...
Click to collapse
I need it to run 64bit only software.

negusp said:
What software do you need to run on Android that requires 64-bit?
Click to expand...
Click to collapse
Dolphin
Nintendo GameCube / Wii Emulator

Thread cleaned of rather sad tripe.
Keep it civil please...

LenAsh said:
Thread cleaned of rather sad tripe.
Keep it civil please...
Click to expand...
Click to collapse
Thanks !

LionLorena said:
Dolphin
Nintendo GameCube / Wii Emulator
Click to expand...
Click to collapse
In all seriousness, even if a 64-bit ROM were ported to the G4 the SD617 inside would struggle heavily.
You need at least an SD801 to run Dolphin anywhere near smoothly.

negusp said:
In all seriousness, even if a 64-bit ROM were ported to the G4 the SD617 inside would struggle heavily.
You need at least an SD801 to run Dolphin anywhere near smoothly.
Click to expand...
Click to collapse
Hm I see.
Well, I've figured since it was to run some 2D title I would do fine.
Since I don't have a very powerful computer either (dual core i3 3217u) and it run said title at 60fps where other 3D games won't pass 10fps.
But that's expected I guess, I think it's time to move on.
I wonder if the Moto Z is 64bit since it is SD820

Didn't yu yureka have a 64 bit is?