Apple’s opting to go with a pretty much carry-over A5X dual-core CPU in the third-generation iPad hasn’t done a whole lot to clarify what processor chip will likely power the iPhone 5 later this year. In fact it’s somewhat muddied the waters.
It’s now been revealed that the “X” in A5 X refers pretty much to the new iPad’s quad-core graphics processor, and not to any speed tweaking of the main processor itself, which remains much the same dual-core Cortex A9-based chip that powers the iPad 2 and iPhone 4S.
The Vietnamese blogsite tinhte.vn has managed to obtain a third-generation iPad prior to the official release, and installed GeekBench software to benchmark its performance, which scores it at 756, which is about the median, or a bit lower, than scores for the iPad 2′s A5 CPU posted on this site:
http://bit.ly/Awc33r

It has been suggested that the A5X may turn out to be an iPad-only special chip engineered especially to support the new iPad’s big Retina display. The new iPad is equipped with 1GB of RAM, double the the iPad 2′s and iPhone 4S’s memory capacity, and quadruple that of the original iPad, but the A5X the CPU is still clocked at 1GHz. Whatever size panel Apple uses in the next generation iPhone, it’s not going to need the graphics processing muscle of the A5X. Michael Nace addressed that point at greater length here on Monday,
So the operative question becomes whether Apple will opt to continue using an A5 dual-core CPU in the iPhone 5, or choose to introduce a quad-core A6 CPU to the world in an iPhone rather than an iPad. That is of course provided that an A6 is ready for release in time for the new iPhone rollout. Arguably, the tradeoff between maintaining a fashionably thin and light form factor and ensuring satisfactory battery life is more critically acute with smartphones than it is with tablet computers, and there will also presumably be the complicating factor of LTE/4G support, which will almost certainly have to be incorporated in the iPhone 5 now that it’s available in the iPad as well as much of the Android competition. LTE will of course mean more power demand, which would make a quad-core CPU logical from that perspective, but would have to be reconciled with acceptable battery capacity and the dictates of fashion.
However, it’s been speculated that new battery technology applied to the new iPad is substantially more efficient in terms of bulk and weight vs capacity, and if that’s an accurate surmise, then it will be used in the new iPhone as well. I think that given the A5X’s decent, albeit not stellar performance in the new iPad while supporting LTE communications, Apple could probably get away with carrying over the A5 chip to the next generation iPhone if the RAM is boosted to the iPad’s 1 GB, although the possible addition of NFC to the mix along with Siri — which is not yet a factor with the iPad would also have to be taken into consideration.
Looking farther into the future, ARM, on whose technology Apple’s A-series CPUs are based, has unveiled a new Cortex-M0+ Processor which it says is the most energy efficient ARM processor available, further reducing energy consumption and increasing performance. ARM claims that the exceptionally small silicon area, low power and minimal code footprint of these processors will enable developers to achieve 32-bit performance at an 8-bit price point, bypassing the step to 16-bit devices. According to ARM, the chip’s optimized architecture with a core pipeline of just two stages enables the Cortex-M0+ processor to achieve power consumption of just 11.2uW/MHz (90LP process, minimal configuration), while raising the performance to 1.77 CoreMark/MHz.

Also looking more and more like a sure thing is a 7.85-inch iPad mini, confirmation of which appears to have been blabbed by an anonymous Samsung Electronics official interviewed by The Korea Times’ Kim Yoo-chul this week.
Commenting on Samsung’s continued robust business relationship with Apple notwithstanding the patent litigation battles they’ve been engaged in, the official is quoted affirming that “The contract [to supply Apple with components] is expected to rise to $11 billion by the end of this year, as Apple is planning to release a smaller iPad, probably with a 7.85-inch screen, and to sell more of its MacBook Air PCs using Samsung’s faster solid state drive (SSD) storage.”
Samsung makes the A5 and A5X CPUs and Samsung’s QXGA panels used in iPhones and iPads, and Apple bought $7.8 billion worth of components from Samsung in 2011, including displays, mobile application processors (APs), NAND flash chips and mobile DRAMs – making it Samsung’s single biggest customer as well as its patent litigation nemesis, the official noting that while “The amount of the current contract is around $9.7 billion,” but suggesting that the amount may go up to $11 billion, depending on demand for Apple products, and is expected to continue increasing until at least 2014 under the terms of the current contract between the two companies, observing that Apple products’ popularity lines Samsung’s pockets as well.
By Charles Moore