Originally Posted by Slurpy
If A8 is dual core, good. Glad Apple isn't jumping on the "more cores for the hell of it" bandwagon. They know what theyre doing when it comes to chip design, which is why the A7 still blows everything else out of the water in most respects, even Samsung's 8 core mobile chips.
Originally Posted by TheOtherGeoff
a mobile device is a i/o device. It's the GPUs that do most of the work. With a single user and strong constraints on power consumption, Dual core (one controlling the general interface, one controlling the logic of the the apps in compute state) is enough. As well as separate chips to do the dirty work of all the other contextual interrupts (networking, motion,sound), it makes sense to focus on efficiency of fewer cores.
Originally Posted by MacBook Pro
The amount of sapphire that GT Advanced Technologies can produce at the Mesa, Arizona plant is equivalent to all other sapphire manufacturing on Earth which includes currently shipping Apple products, namely the iPhone 5S. Apple would not need to double the manufacturing capacity of the entire Earth to slightly more than double their usage of sapphire.
Apple will not increase the clock speed to 2 GHz.
Originally Posted by GrangerFX
Perhaps the iPhone 6 has 2 cores while the iPad Air 2 has 4. Apple has a lot of code that can use multiple cores and they can really help when multi-tasking. More cores make it easier to drive data to the iPad's larger display.
I think apples decided that one processor for all works, unless we see the A8 being huge and even a A7X on lower devices.
Originally Posted by Andysol
Exactly- iOS doesn't need 4 cores. The only reason I could see them implementing it now is if legitimate multi-tasking is planning on coming to the iPad in the future and they want to make sure it has backwards capability.
Again- That's a long shot. I just don't see the need
Where I do see the need with Apple's A7 (and subsequently A8 SoC) is some more RAM. 1.5-2gb (particularly on iPad) would go great lengths at expanding capabilities there. Anandtech mentioned the bottleneck occurs with RAM before CPU on the A7. The A8 will only lengthen that.
All of that said- I can't wait to see whats released in September and October.
I've assumed for 2 years that the A8 will be dual core and 2 gb ram, it's how apples past has been.
Originally Posted by SockRolid
Agree with you and Andysol. Yes, more cores can deliver nearly-linear performance gains (e.g. 12-core Mac Pro). This is mostly because of Apple's work on Grand Central Dispatch in both OS X (since 10.6) and iOS (since 4.0). GCD makes it vastly easier for developers to exploit multiprocessing, and optimizes it for them. Then there's OpenCL, which can use the massively parallel computing power of the GPU to perform general purpose computations if and
when the GPU has spare cycles.
But multiprocessing (harnessing multiple CPUs) is useful at all times. Not just when you happen to be multitasking (which I assume you are defining as "switching between apps"). Even the most basic app needs multiple threads: one for handling GUI events and at least one background thread for doing computations to generate results to display. So any app can benefit from multiprocessing. Especially if if spawns many background threads. And it's easy to get many threads going, for example when fetching data from a URL and calculating a result to display and writing data to "disk" and updating iCloud all at once.
So, of course, bringing up the subject of quad-core A8 SoCs in next-gen iOS devices might trigger battery life concerns. Well, my theory is that the faster you finish intensive processing tasks, the sooner you can revert to "idle." So your total power usage would increase logarithmically instead of linearly. Firing up 4 cores at once may draw more peak current, but you'd be drawing that current for a shorter time. I'm sure Apple can and will tweak performance vs. power usage in Grand Central Dispatch. And the larger frame of the (rumored) iPhone 6 model(s) might allow for a slightly larger battery. We'll see.Having said all that, I wouldn't be surprised if Apple did reserve the first quad-core A8 SoCs for the high-end of each iOS device line. Maybe they'll use the dual-core in the 4.7" iPhone and iPad mini Retina, and quad-core in the 5.5" iPhone and iPad Air. And maybe quad-core in a new high-end 4K Apple TV. Who knows?Oh, and I almost forgot about the software side of performance. At WWDC, Apple announced the Swift programming language and Metal graphics API, both next-gen technologies that Apple claims are vastly faster than legacy Objective-C and OpenGL. Looking forward to both.
Maybe power management but then again a good dual core could be there.
Originally Posted by wizard69
A performance enhanced A8 would be good enough for iPhone, however it won't do for iPad and some other things Apple could be working on. This is why I've stated before that I could see "X" variants again of Apples processors. With the X variants targeting higher performance machines, it would be easy for Apple to deliver a highly optimized cell phone chip.
Beyond that I've heard solid rumors that Apples goals this go around have been improved power efficiency. People might end up underwhelmed by the next iPhone processor if they don't value battery life.
Again all performance shows the A7 is on the same performance of any other phone/tablet this year. A A8 could be again and X variants unncesary.
Originally Posted by AdonisSMU
Apple has starved people of reasonable hardware upgrades. They are so desperate for an upgrade to the hardware that even just adding additional ram is enough to satisfy them.
Ha, good one.
Originally Posted by fallenjt
Whatever Apple do with the chip, they make the most out of it. Samsung's octa-core chip was nothing more than just a gimmick because it only worked 4 cores at the time. How pathetic! That's why Samsung decided to use SnapDragon quad-core chip in their GS4 handset for US market instead of their own Exynos Octa-core (only for European GS4).
Agree, that the quad or right core performance is all gimmick from Samsung.
Originally Posted by netrox
Contrary to popular belief, having more cores do NOT mean more dramatic performance. It doesn't scale well at all. The main benefit of using multiple cores is improved multitasking and we know that the iOS UX is not written to be a windowed multitasking OS. The two cores are more than enough to multitask the main app and a few background processes.
There will be a time when it's appropriate for Apple to add more cores for more background processes which are expected to grow quickly with more open iOS 8 API's but Apple obviously thought carefully and decided that instead of adding another core, they designed M7 which is dedicated to running specific processes and it works extremely well - always running but takes a tiny amount of power.
On the note, I've always assumed A8 would be a power efficient dual core with 2 gb ram, but get somewhere along lines of 2ghz. Then A9 would be apples quad core. Unless there is secret things in IOS 8, it's made for dual core. There's just not enough to push that out now, of course next year it would be stupid not to. Now as people are thinking the iPhone 6 is going to be thin, thus small battery, thus power efficient lowered processor that it'd end up half way on everything, but this is apple where talking they can work mind miracles like this where every category gains.