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How much did Apple sell the iPhone 5c for again?
Based on the bill of materials for the 5s an A7 costs $19. They will be shrinking the die to a 20nm process for the A8 so that could go up a few dollars given that it's a new process. Still it should be around the same die size if the make it quad core so we're looking at $80 for a 16 core Mac (4 cores x 4 chips). Substantially cheaper than the 300-400 Intel charges. That doesn't take into account the custom Intel chipset cost which is relatively small.

Also for anyone interested to see how Intel has struggled to keep up with ARM, here's a good summary. The assumptions about the 64 bit A7 are uneducated, but the rest is good financial statement and marketing analysis of the processor industry.
http://www.computingcompendium.com/2014/01/intel-is-being-soundly-beaten-by-arm.html

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This rumor is based on that Apple presumably has a prototype, which means they are toying with the idea. Do you know what version of an Apple chip this is running, and how it performs. No.

... And they were toying with Intel chips for a while. I can hear Tim Cook now.... "OS X has been living a double life." (Steve Jobs when they switched to Intel) I would break out laughing!
 
Excuse me, but Apple bought PA Semi a few years ago. _That's_ what their expertise comes from. Sure, they are hiring new people who become available, including from AMD, but that's a minor part.

https://www.macrumors.com/2013/05/2...es-for-an-orlando-gpu-team-still-hiring-more/
12 AMD engineers isn't necessarily for leadership positions... but the head of the Brazos platform, Jim Mergard, was and it's very significant. He definitely had a big hand in A-series chip development.
http://www.zdnet.com/apple-hires-samsung-amd-chip-veteran-7000005676/

"Let's not forget that Apple not only requires processors of iPhones and iPads but also its range of Mac computers. Patrick Moorhead, a former AMD executive who now leads the research firm Moor Insights & Strategy, said Mergard could help Apple break free of Intel."

From THAT we get a lot of insight into why Apple moved to the 64 bit architecture so early and what their real objectives might have been motivated by.

The A7 is the widest ARM architecture in production. It's instructions per clock are near Intel Core levels so it would be a wonderful springboard for designing an A8 architecture to be put in Macs.
 
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If Mac switch to ARM, I will switch back to PC.
I can not leave windows/vmware/pd at all. A lot of things depends on Windows XP and IE6, and some private enterprise software.
 
So here's why you're wrong.

http://cpuboss.com/cpus/Intel-Core-i7-2635QM-vs-Apple-A7

Benchmarks, numbers, that prove it.

The Intel Core i7 2635QM is 10 times faster than the Apple A7.

So no the A7 is not half the speed of your Mac.

The Intel Core i7 2635QM is old tech too so it's probably more than 10 times faster than the A7. The current processors in the current macs are the 4000 series. Intel Core i7-4950HQ.

Even if Apple doubled the speed for 10 years it'll still be slower than Intel ad infinitum.

Early 2013 13" Macbook Pro Retina
http://browser.primatelabs.com/geek...:"Intel Core i5-3230M" frequency:2600 bits:64

But to be more fair we can use the most recent 13"
http://browser.primatelabs.com/geek...:"Intel Core i5-4258U" frequency:2400 bits:64

That score for the 2635QM is also a little inaccurate and it's a processor that fits the TDP of the old Macbooks, NOT the new retinas which require a lot less.
http://browser.primatelabs.com/geek..."Intel Core i7-2635QM" frequency:2000 bits:64

It's not fitting to only look at the quad core 15" because it's the only modern Macbook you can get a quad core in now. Looking at intel's leaked roadmaps, the 13" pro won't get quad core in it's TDP range for a while. Intel really stuck it to Apple on that one. I've been hoping for one but it doesn't look like I'll get one anytime soon. For other Macbooks except the 15" the A7 is about 2/5 the speed per core at it's measely, power-efficient, 1.3GHz.
 
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Actually the A7 in the iPhone 5S scores 2400.. not quite double the 1300 of the A6 or 1400 of the A6X. Geekbench is eh. A lot of the A7's performance boost in Geekbench actually comes from cryptography improvements (e.g. AES), which don't make much difference in 99% of applications. And the graphics wouldn't be even close.



Maybe. But not if it's supposed to be so ultra-thin that it's even slimmer than the current MBA. By the way, it's only a matter of time before quad core is available in a 13" form factor as well. And your mention of doubling the clockspeed would MORE than double the power consumption of the chips. Way more than double it. It might even quadruple it, and then if you double the number of cores, well, who's to say that it wouldn't exceed the 15W package that Intel offers for its low-power chips in the MBA?

It's not as simple as you seem to think it is.




Maybe.

Apple's shift from PowerPC to Intel made sense because so much of the world already ran on Intel. That's not true for ARM outside of mobile space.

Geekbench scores actually vary even on standard hardware like the iPad Air. I'm typing on one now and it gets between 2670-2700. But that's the 1.4GHz version. Which is on the high end.
I'm aware going up to something like 2.6 GHz would take a large vcore boost and the TDP increases exponentially with voltage (I used to toy with the original AMD FX's with sub-zero cooling. Fun.) I think what they'll do is have the cores scale up in clock speed when a small number of threads demand it. But I doubt they'll be able to scale all the cores at once except for short bursts. But 4 or 8 from a total of 16 should be doable. I expect with that many cores, a few of them will be powered up to full speed most or all of the time to keep single threaded performance consistent and the user experience fluid.
 
I don't really have any problem with this idea especially if prices come down but I still think Apple are being lazy if they think that the current mac mini and classic macbook cut it in their current chip-graphics form. I would hate to think we would have to wait until ARM in a mac is ready at some distant point before being able to get an updated mini.
 
Who didn't see this coming?

Please.

It was obvious.

Autonomy is a major goal for a company like Apple. Half their products are tied to the whims of Intel, and Intel is falling short of Apple's needs.

I wouldn't be surprised if all, or nearly all, Apple computers are on Ax processors by 2020. Apple can design chips that are maximized for their demands. Apple always made excellent processors, when they made processors.

If they switch over again, Apple better make their software progressive and perfect. That's a large order for a company that can barely straighten out their iTunes program and store despite endless feedback and over a decade of time.
 
The "post PC era" is JUST a gimmick

skaertus wrote two days ago:

This whole "post-PC" era is a market gymmic which Apple did not create, but used it to its benefit. It's purely Apple's sales pitch, because the Mac was never as popular as the PC and Apple tries hard to push to devices where it has leverage. It's marketing.

It's funny to observe how many actually mistakes this marketing gimmick for being a truth or a fact.

A clamshell computer for personal use (aka PC) will not disappear from the market, because it's has a so good ergonomical setup: Desktops with a screen in front of you on a table, and a keyboard where one's hands are - and laptops that are lapable or lapfriendly in the sense that the unit safely can be place on one's lap without having a heavy screen-lid being taken care of by a kickstand (for example SP3) or by being semi-connected to the keyboard, and therefore with so high risk for falling on the floor.
 
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skaertus wrote two days ago:



It's funny to observe how many actually mistakes this marketing gimmic for being a truth or a fact.

It's such a powerful marketing gimmick that I can't recall Apple ever using it in one of their ads. As for being "truth", it's pretty clear the computer focus is moving toward devices other than desktops and laptops. Not sure why feelings are so hurt by this (except for companies with falling PC sales and floundering mobile sales).

Also note that Microsoft acted like they disagreed with "Post PC" by trying to coin "PC Plus", but when you examined what they meant closely, you see that they mean exactly the same thing.
 
Just in case...

secretdoublelife.jpg


I couldn't help myself :x
 
Apple maybe developing some alternative platform keeping it as *INSURANCE* just in case Intel becomes an inconvenient supplier of its technology arrives to a dead end and just can't evolve, If so every app must be re-compilled and in some cases heavy redesigned due opposite approach on this such binary endian, and memory addressing, kernel protection etc. Not as easy as going from 32 to 64 bits on iOS, it's much more complicated just to say something, the most complicated situation is related to drivers, but Apple would regain full control of the platform blocking *hackintosh*development but losing bootcamp being impossible to host another os than OSX, also visualization hardly will be enough efficient on most cases. Notwithstanding represent a much more efficient aproch than Intel with strong independence and scalability.
 
Well it certainly makes sense in the short term to do a new product line. However long term Intels days are numbered. Even if Apple stays i86 they maybe forced to go AMD simply because AMD is very willing to do custom. In the end it is all about what goes on the chip.

I have yet to see ONE person tell me what the BLEEP Apple needs with a "custom" chip! What is Apple doing that needs a custom ANYTHING? They don't do a single thing that is special and requires custom anything. They fetch email and text and run MOSTLY *STUPID* *WORTHLESS* Apps. WTF wants a desktop/notebook platform based on STUPID? I sure as hell don't, but that's what the iPad IS. It's a browsing/email/movie/music player that has apps that check sports scores and play slot machine type garbage games. THAT is what we want on the desktop system? I don't think so. You iOS types are living in another Universe. A texting Universe where iPads are SOOO awesome and you think the desktops should be SOOOO awesome when in fact they've been able to do everything an iPad can plus 100x more from before the iPad was even invented.

iPads don't get hot? My iPod 4G gets HOT AS HELL. Myth BUSTED as to lower/cooler power use. It's complete nonsense. The battery didn't last that long either. My 1st Gen iPod Touch gets 5x the battery time as my iPod 4G. It didn't get more efficient. It got more powerful and sucked battery juice accordingly.

We're going to get 8 lower power CPUs instead of 2-4 high power ones? What good is THAT? MOST Apps don't even do TWO threads very well, let alone 16. A Mac Pro may be good at video encoding/decoding, but how much better does it run Office or even a game? Not very because it's hard to get Apps to do a whole bunch of different things at the same time when they're dependent on previous things being processed already, not at the same time. Parallel computing SUCKS for the most part. It's a bad solution to the problem of not being able to make single CPUs significantly faster any longer. The problem is it only helps so much with a single given app, especially ones that are not well suited to parallel processing and require a LOT of work on the developer to even make SOME use of them.

Now there's this talk about saving $300 off the cost of a notebook I saw in this thread. Apple once said they weren't going to do $600 notebooks. $300 of is only a $800 notebook and yet competitors have been doing $600, no even $300 notebooks for a LONG time now. There's no barrier to Apple getting a lower performance cheaper notebook out there like everyone else! They stated they DID NOT *WANT* to engage in that low-end low-profit margin junk fest market because it will bring ALL Macs' reputation down with it. So what do you guys think a low-end A8 iPod-in-a-box notebook is going to do????? It will split the Mac market into multiple CPU variants again (confusion and a mess galore just like with PPC/Intel at the same time only worse since they would be sold at the same time, not just a transition period) and all to gain an iPod-in-a-Box. WTF for?

Again, you guys are obsessed with iOS or something. That would be about the worst move Apple could make since Johnny Ive's crayon-colored iOS update. Well, wait there's this ridiculous BEATS purchase. Hey, it's all starting to make sense now. Cheap crappy headphones pushed by celebrities that have mass market appeal is what Beats is. So now they want cheap crappy slow ARM based notebooks pushed by the same celebrities and made mass market friendly and that will be the "New Apple". The problem is the rest of their market will abandon ship and all the high-end stuff (which has already been jumping ship for some time now with slow Mac Pro updates, the abandoning of servers and pro software updates, etc.) will finally leave Apple once and for all. Macs used to be a market for creative, high-end and think differently types. It's clear Apple wants to go MASS MARKET instead. They became #1 by being mass market? No. They didn't. They should think about that before they destroy Apple once again. I think it's inevitable, though. Tim Cook can't think his way out of a paper bag, let alone innovate. Johnny Ives thinks crayon colors is innovation? It's a make-up job. Neither apparently knows how to actually INNOVATE. They scream DESPERATION for anything that looks DIFFERENT even if it's worse.

Then you have the CPU-armchair-quarterbacks on here that all seem to know what the difference are between CPU designs and are writing x86 as ancient and ARM as new and innovative without having a freaking CLUE about them in any meaningful way. They crunch binary numbers, people. They're not alien technology. What you DO need to know is that Windows runs x86, not ARM and Windows compatibility and easier application porting is the best selling point of changing from PPC to x86. PPC was a wasteland compared to the amount of software available now and all thanks to Intel. Go to ARM and you gain millions of stupid GARBAGE "fart" apps and lose all your meaningful software. Yeah, some will convert their software, but why bother? It sends a bad message that Apple is UNSTABLE and might go to yet another CPU in the future or even back to PPC. They can't make up their minds over short-term gains? Ridiculous.

The TYPE of CPU isn't what made OS X special, but screwing with the market over a control issue is dumb. What happens to Apple if their new fancy "custom" ARM comes out and Intel creates their next "AMD Killer" (like Core2Duo did) and leaves Apple's ARM in the DUST? Instead of "control" the'll have a "custom" SLOW POS that NO ONE will want. Using Intel or even AMD ensures they stick with the flow since the rest of the market is using it. You don't want to cost 2-3x as much and be SLOWER like they were with the G5 in the last days of PPC. It makes your platform look BAD as does constantly switching CPU types without a good enough reason to do so.

As iOS gets more powerful, it should be moving towards OSX proper, not the other way around. You don't needs desktops and notebooks running dumbed-down LESS CAPABLE operating systems and software. You run that software because you need those lesser systems to function. But as they get more powerful and control methods (like voice input) improve, they should move more towards the powerhouse OSX and away from the primitive iOS. Yes, you can add functions in OSX that make sense from iOS, but you don't turn OSX into iOS and you don't slow down your platform and go rogue just because you're a control freak and that is the way Apple comes across sometimes when they eliminate choices for no other reason (e.g. the whole sync over USB option being removed from OSX that went over like a ton of bricks).
 
Then you have the CPU-armchair-quarterbacks on here that all seem to know what the difference are between CPU designs and are writing x86 as ancient and ARM as new and innovative without having a freaking CLUE about them in any meaningful way. They crunch binary numbers, people. They're not alien technology. What you DO need to know is that Windows runs x86, not ARM and Windows compatibility and easier application porting is the best selling point of changing from PPC to x86. PPC was a wasteland compared to the amount of software available now and all thanks to Intel. Go to ARM and you gain millions of stupid GARBAGE "fart" apps and lose all your meaningful software. Yeah, some will convert their software, but why bother? It sends a bad message that Apple is UNSTABLE and might go to yet another CPU in the future or even back to PPC. They can't make up their minds over short-term gains? Ridiculous.

Do you believe that the CPU is the biggest barrier for porting software from Windows to OS X.
 
Apple maybe developing some alternative platform keeping it as *INSURANCE* just in case Intel becomes an inconvenient supplier of its technology arrives to a dead end and just can't evolve, ...

And this insurance would not be worth much with no applications for it. But a few sexy low-end (thus affordable and potentially high-volume) arm64 OS X products (introduced as a canon shot over Intel's bow) would drive Mac & iOS developers to port their apps (such porting not being rocket science for the vast majority of Mac App store and iPad apps).

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What happens to Apple if their new fancy "custom" ARM comes out and Intel creates their next "AMD Killer" (like Core2Duo did) and leaves Apple's ARM in the DUST?

Easy. They sell both a low-end and high-end Mac OS X line, just like they did for awhile during PPC/Intel transition. Developers build fat binaries that run on both. Consumers choose between extreme battery life and pure performance.
 
And this insurance would not be worth much with no applications for it. But a few sexy low-end (thus affordable and potentially high-volume) arm64 OS X products (introduced as a canon shot over Intel's bow) would drive Mac & iOS developers to port their apps (such porting not being rocket science for the vast majority of Mac App store and iPad apps).

Migrate an app from one platform to another isn't as trivial as you see, actually there are more in common between powerpc OSX and arm64 OSX than with x86/64 OSX, for a few apps maybe a trivial task as re-compiling recycling every line of code, but those are few, the issue with the big endian and little endian of the bitwise operation impact those is like writing Arabic and then Roman, you need to rewrite the core of your code, re-validate algorithm etc, some cases trivial other not (the most important issue is with cryptography where endian is definitive).

I Support the transition to an much more efficient platform with 32 or so risc cores are by far more efficient and flexible in some applications, specially with more advanced arm64 cores with super scalar processing (executing more than 1 instruction by clock cycle), but this will be very expensive in the software side, most titles actually on OSX will not be migrated, some for things like being abandoned other just due cost and low market (while later this is not an issue).

Let's see what's happening, I don't believe Apple will move to another platform soo while Intel being a good business partner.
 
Migrate an app from one platform to another isn't as trivial as you see, actually there are more in common between powerpc OSX and arm64 OSX than with x86/64 OSX, for a few apps maybe a trivial task as re-compiling recycling every line of code, but those are few, the issue with the big endian and little endian of the bitwise operation impact those is like writing Arabic and then Roman, you need to rewrite the core of your code, re-validate algorithm etc, some cases trivial other not (the most important issue is with cryptography where endian is definitive).

This relies on the fact that a majority of your code is endian dependent, which isn't very likely at all.
 
Do you believe that the CPU is the biggest barrier for porting software from Windows to OS X.

It's certainly the biggest barrier for RUNNING Windows, whether in Boot Camp or even just VMWare. I've got Win98, WinXP, Linux and OSX Snow Leopard Server available in VMWare on my server and I could easily add Win7, 8.1 and even Win3.1 and Dos if I wanted to. None of that would run with ARM CPUs. We'd lose a heck of a lot of flexibility. I'd rather see Apple go back to PPC than to ARM. At least then we'd regain software compatibility with a lot of old PPC software. You gain exactly nothing with ARM except perhaps straight conversion of iOS Apps, which can already be recompiled for OSX with little effort.

Easy. They sell both a low-end and high-end Mac OS X line, just like they did for awhile during PPC/Intel transition. Developers build fat binaries that run on both. Consumers choose between extreme battery life and pure performance.

And that's a good thing? That's a horrible idea. Let's fracture the software base from PPC to PPC/Intel and then to Intel/ARM and worse yet, sell BOTH at the same time all the time. It would be better to move iOS over to x86. If Apple wants to run their own CPUs, let them design their own x86 improvements instead. WTF use ARM? It's SLOW (nowhere near x86 yet) and incompatible with Windows and current OSX software whereas iOS apps are a simple recompile to Intel plus Apple already has a developer emulator available already and it runs just fine because Intel is FASTER than ARM. It won't run so well the other way around (i.e. an emulator for Intel apps running on CPUs that are slower. They would be SNAILS by comparison).
 
"Let's not forget that Apple not only requires processors of iPhones and iPads but also its range of Mac computers. Patrick Moorhead, a former AMD executive who now leads the research firm Moor Insights & Strategy, said Mergard could help Apple break free of Intel."

WTF would you WANT to break free of Intel??? There's a reason most companies aren't completely vertically integrated. It takes a LOT to stay ahead in ALL areas of a computer. Intel specializes in CPUs. Do you honestly believe for ONE SECOND that Apple can do better than Intel with its own lines of CPUs? Add to that all the crap I've just talked about and it's the biggest bonehead conjecture I've EVER heard about. Even Beats has some connections in the music industry (although it fails me to understand WHY they would WANT those connections when they're already #1 in sales). Moving desktops to a PHONE platform is the dumbest idea in the history of computers and I GUARANTEE it will END Apple in the long run if they do it. Their stock will drop faster than the original Black Monday crash.

The A7 is the widest ARM architecture in production. It's instructions per clock are near Intel Core levels so it would be a wonderful springboard for designing an A8 architecture to be put in Macs.

Wonderful? For whom? Mergard? How does it HELP Apple? I'm still waiting to hear what "custom" things Apple needs that Intel isn't providing. A quad-core for the Macbook Air? What's the purpose in the Macbook Air now that the Macbook Pros have shrunk in size to almost Air levels? That computer is REDUNDANT and IMO should fall under Apple's policy of not running products that cannibalize sales of another product (i.e. the excuse we always hear in theory/conjecture why they won't make the Mac "X" tower since it would cannibalize iMac and/or Mac Pro sales.) Ditch the Air. Good riddance. Get us a gaming Mac instead with up-to-date OpenGL and a high-end gaming video card. That can't eat sales since Apple has never targeted gaming EVER in a Mac, at least not since OSX came to be.
 
That computer is REDUNDANT and IMO should fall under Apple's policy of not running products that cannibalize sales of another product (i.e. the excuse we always hear in theory/conjecture why they won't make the Mac "X" tower since it would cannibalize iMac and/or Mac Pro sales.) .

Uh...Apple has explicitly stated that they do cannibalize their own products:

Tim Cook:

"“I see cannibalization as a huge opportunity for us,” Cook said Wednesday. “Our core philosophy is to never fear cannibalization. If we don’t do it, someone else will. We know that iPhone has cannibalized some of our iPod business. That doesn’t worry us. We know that iPad will cannibalize some Macs. But that’s not a concern. On iPad in particular, we have the mother of all opportunities because the Windows market is much, much larger than the Mac market. It is clear that it is already cannibalizing some. I still believe the tablet market will be larger than the PC market at some point. You can see by the growth in tablets and pressure on PCs that those lines are beginning to converge.”
 
Migrate an app from one platform to another isn't as trivial as you see, ...

For some apps, not for many. I've ported several large apps from OS X PPC to ia32 to x86-64, from armv6 to arm64, and from iOS to OS X. Some UI redesign was required for the latter. Otherwise, no rocket science, just some days of test/debug time. I pulled out some ancient asm code, and the compiler did quite well on the C replacement code.

For years, high-end Mac developers built combined (fat) 68k/PPC apps and PPC/Intel apps. We're used to it. Adding ARM64 slices is tons simpler than the 68k to PPC and Carbon to Cocoa transitions.
 
I have yet to see ONE person tell me what the BLEEP Apple needs with a "custom" chip! What is Apple doing that needs a custom ANYTHING? They don't do a single thing that is special and requires custom anything. They fetch email and text and run MOSTLY *STUPID* *WORTHLESS* Apps. WTF wants a desktop/notebook platform based on STUPID? I sure as hell don't, but that's what the iPad IS. It's a browsing/email/movie/music player that has apps that check sports scores and play slot machine type garbage games. THAT is what we want on the desktop system? I don't think so. You iOS types are living in another Universe. A texting Universe where iPads are SOOO awesome and you think the desktops should be SOOOO awesome when in fact they've been able to do everything an iPad can plus 100x more from before the iPad was even invented.

iPads don't get hot? My iPod 4G gets HOT AS HELL. Myth BUSTED as to lower/cooler power use. It's complete nonsense. The battery didn't last that long either. My 1st Gen iPod Touch gets 5x the battery time as my iPod 4G. It didn't get more efficient. It got more powerful and sucked battery juice accordingly.

We're going to get 8 lower power CPUs instead of 2-4 high power ones? What good is THAT? MOST Apps don't even do TWO threads very well, let alone 16. A Mac Pro may be good at video encoding/decoding, but how much better does it run Office or even a game? Not very because it's hard to get Apps to do a whole bunch of different things at the same time when they're dependent on previous things being processed already, not at the same time. Parallel computing SUCKS for the most part. It's a bad solution to the problem of not being able to make single CPUs significantly faster any longer. The problem is it only helps so much with a single given app, especially ones that are not well suited to parallel processing and require a LOT of work on the developer to even make SOME use of them.

Now there's this talk about saving $300 off the cost of a notebook I saw in this thread. Apple once said they weren't going to do $600 notebooks. $300 of is only a $800 notebook and yet competitors have been doing $600, no even $300 notebooks for a LONG time now. There's no barrier to Apple getting a lower performance cheaper notebook out there like everyone else! They stated they DID NOT *WANT* to engage in that low-end low-profit margin junk fest market because it will bring ALL Macs' reputation down with it. So what do you guys think a low-end A8 iPod-in-a-box notebook is going to do????? It will split the Mac market into multiple CPU variants again (confusion and a mess galore just like with PPC/Intel at the same time only worse since they would be sold at the same time, not just a transition period) and all to gain an iPod-in-a-Box. WTF for?

Again, you guys are obsessed with iOS or something. That would be about the worst move Apple could make since Johnny Ive's crayon-colored iOS update. Well, wait there's this ridiculous BEATS purchase. Hey, it's all starting to make sense now. Cheap crappy headphones pushed by celebrities that have mass market appeal is what Beats is. So now they want cheap crappy slow ARM based notebooks pushed by the same celebrities and made mass market friendly and that will be the "New Apple". The problem is the rest of their market will abandon ship and all the high-end stuff (which has already been jumping ship for some time now with slow Mac Pro updates, the abandoning of servers and pro software updates, etc.) will finally leave Apple once and for all. Macs used to be a market for creative, high-end and think differently types. It's clear Apple wants to go MASS MARKET instead. They became #1 by being mass market? No. They didn't. They should think about that before they destroy Apple once again. I think it's inevitable, though. Tim Cook can't think his way out of a paper bag, let alone innovate. Johnny Ives thinks crayon colors is innovation? It's a make-up job. Neither apparently knows how to actually INNOVATE. They scream DESPERATION for anything that looks DIFFERENT even if it's worse.

Then you have the CPU-armchair-quarterbacks on here that all seem to know what the difference are between CPU designs and are writing x86 as ancient and ARM as new and innovative without having a freaking CLUE about them in any meaningful way. They crunch binary numbers, people. They're not alien technology. What you DO need to know is that Windows runs x86, not ARM and Windows compatibility and easier application porting is the best selling point of changing from PPC to x86. PPC was a wasteland compared to the amount of software available now and all thanks to Intel. Go to ARM and you gain millions of stupid GARBAGE "fart" apps and lose all your meaningful software. Yeah, some will convert their software, but why bother? It sends a bad message that Apple is UNSTABLE and might go to yet another CPU in the future or even back to PPC. They can't make up their minds over short-term gains? Ridiculous.

The TYPE of CPU isn't what made OS X special, but screwing with the market over a control issue is dumb. What happens to Apple if their new fancy "custom" ARM comes out and Intel creates their next "AMD Killer" (like Core2Duo did) and leaves Apple's ARM in the DUST? Instead of "control" the'll have a "custom" SLOW POS that NO ONE will want. Using Intel or even AMD ensures they stick with the flow since the rest of the market is using it. You don't want to cost 2-3x as much and be SLOWER like they were with the G5 in the last days of PPC. It makes your platform look BAD as does constantly switching CPU types without a good enough reason to do so.

As iOS gets more powerful, it should be moving towards OSX proper, not the other way around. You don't needs desktops and notebooks running dumbed-down LESS CAPABLE operating systems and software. You run that software because you need those lesser systems to function. But as they get more powerful and control methods (like voice input) improve, they should move more towards the powerhouse OSX and away from the primitive iOS. Yes, you can add functions in OSX that make sense from iOS, but you don't turn OSX into iOS and you don't slow down your platform and go rogue just because you're a control freak and that is the way Apple comes across sometimes when they eliminate choices for no other reason (e.g. the whole sync over USB option being removed from OSX that went over like a ton of bricks).

That is the most unintelligible piece of crap that has been posted on this thread. You need to educate yourself on processor architectures and marketing in the personal computer business before you go mouthing off like that.
Here's the best place to start, Anand Lal Shimpi. He started Anandtech to critique computer hardware when he was 14 years old in 1997. The guy's an expert. He's historically been the most accurate authority on the computer market. He knows where the market is going before it gets there. He knows more than 99% of the people on this site.
Here's why you can't compare the A7 to any ARM chip in existence:
http://www.anandtech.com/show/7910/apples-cyclone-microarchitecture-detailed

Here's the Haswell architecture for comparison.
http://www.anandtech.com/show/6355/intels-haswell-architecture/8

The A7 is not a mobile chip, it's designed to be like a low-performance desktop chip. It's down-clocked to be power efficient enough to put in a phone or tablet. That's what Intel has been doing with their Core architecture but they've failed to be competitive enough. They targetted power consumption with Haswell because Apple threatenned to ditch them if they couldn't get power consumption down. Apple wanted all-day battery life for lighter notebooks and less heat to cool so they could make the Macbooks smaller, lighter and quieter. The Macbook processors would have had to be slower if they hadn't forced Intel to work harder.

Also, ARM runs with simplified instructions. x86 processors convert x86 to simplified instructions to process them faster. That's how Intel leapfrogged AMD years ago with the Core architecture. x86 cores are basically running in a legacy mode most of the time because simplified execution units are far more efficient. It's more efficient to just require code be put in simple instructions and emulate for the remaining code than to keep the status quo.
This article will give you a good understanding of how we got where we are in x86 architecture:
http://www.anandtech.com/show/1998

Apple will not be abandoning x86 code. They will have an emulator and with the power of these new A8 cores and a minimum of 16 in each design the emulator can be very inefficient and still soundly beat intel. Companies designed emulators with a seamless user experience for x86 on ARM years ago. It's nothing new.
Besides that, for Microsoft and the personal computer business to survive they have to cut out Intel's chips in favor of cheaper solutions. They can't do it yet because there aren't any other ARM cores designed to meet consumer pc and laptop needs. Microsoft knows their only way to keep selling windows at the same pace is to transition software to the ARM platform or at least get compatibility with it. They will be glad to help Apple move software companies over because they will benefit in the end.
And no, Apple will not design a gaming Mac so you can play Crysis on the highest settings. The current iMac is good enough for 98% of the population's performance needs. I wouldn't want a Mac that has those price and form factor compromises over the current one. Neither would 98% of the population. That's how marketing works, the fact is 2% of the population isn't worth designing a computer for.

Read this whole thread and you'll learn a lot more.
 
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Here's the power management mentions for the new iMacs.

Mac-81E3E92DD6088272.plist / iMac15,1 (IGPU only)
Mac-42FD25EABCABB274.plist / iMac15,n (IGPU/GFX0/Apple display with id 0xAE03)
Mac-FA842E06C61E91C5.plist / iMac15,n (IGPU/GFX0/Apple display with id 0xAE03)

The EDID data for the display is set to a screen size of 60 x 34 CM but the resolution data is blank.

I think this means one Mac will have only an integrated GPU so if it's an ARM it will be the next version of PowerVR, probably running on all cores.
The other two seem to have integrated GPUs and discrete GPUs, assuming GFX0 references the discrete GPU.
I bet the one with only an integrated GPU is the iMac replacement for the Mac Mini. The others are probably iMacs with 4 and 8 chips. The bottom two reference the same display. They have the same size display. Works out to 27" so these are the premium models.
The "n" could also stand for different resolutions. But one is probably a 4 chip iMac and the other an 8 chip. The top could be the base model that's non-retina with 4 A8 chips.
Sounds like they're discontinuing the 21" if they're not updating it....
 
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