*clipped for space*
Along with these ideas, they've expanded the dynamic range of the CPU each iteration. (Basically the ability to run fast for short periods of times, to make the system feel snappy, while running slower for work that doesn't need to be finished ASAP --- like Intel turboing.) Just like Intel I expect this to improve each iteration so that, in future, we'll be seeing Apple (and other ARM) CPUs rated at something like nominal 2GHz, but able to turbo up to 3GHz.
Wow! Thanks for the reply.
You've done the most thorough explanation. It seems what you're saying though is that while going to A8 will likely be 1.5x, the A9 stands poised to benefit from still many other micro architecture advances that haven't yet been incorporated and could be an even bigger leap.
All I know is I don't think Apple will necessarily push their CPU team this cycle because they have such a large lead and they're still waiting for apps to utilize the power in the A7. From a business perspective it would be more prudent to extend less here and make minor improvements. By 2016 when others are catching up to Cyclone Apple can jump their A9 another generation ahead.
These are great posts guys - thanks! Far more knowledgable about the details than I am.
I see what you're saying Usamaah and I would tend to agree with you in that I wouldn't be upset in the slightest if Apple lays off the processor this go around and only makes minor tweaks. As you stated, there still aren't any apps that truly push the A7 to its max and Apple has such a large lead here it would go against their business history to jump even farther ahead than they really have to.
On the other hand, as name99 points out, Apple has increased processor performance by at least 1.4-1.5x with every new generation - especially since they took over the designing of the A series chips.
Should be interesting to see what they pack in there. I would be surprised if we see the "X" variant pop up again - A8 in the iPhone 4.7" and iPad Mini, A8X in the iPhone 5.5" and iPad Air. Something to make the $100 price jump feel more valuable.
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Completely agree. I use Office, SQL Server, etc. at work, and that will be a decade or 2 before ARM would even be a possibility.
But for the majority of users, even just an ARM coprocessor that uses 5w instead of 28w for a Macbook would be a major improvement, especially if most of the time, people are just using the browser.
My work Dell runs on a Core 2 Duo. Granted I don't do a ton of heavy lifting, but the A7 is just as powerful processor wise.
The real work lies in the adaptation of legacy software to a different processor type/architecture. But we're already starting to see that with Office. It'll take more niche/specialized software a little longer to get there, but we're far closer than a decade let alone 2 away from it being a reality.
I get it that Geekbench isn't the end all be all and there's more to it - but its a good general tool to compare:
Intel Core 2 Duo P9400 (Dell Lattitude): MultiCore Score = 2204
Apple A7 (iPad Air): MultiCore Score = 2467