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Is Apple Hiding Something On iPad 2 SoC?

Apple's A5, the system on chip that powers the iPad 2 and possibly the iPhone 5, contains a large amount of extra circuitry the purpose of which has yet to be determined.

According to Linley Gwennap (opens in new tab), the senior editor of Microprocessor Report, that surface area, around 33 square millimeters, is larger than the GPU on the A5 which stands at 31 square millimeters and is larger than the surface area of the Nvidia Tegra 2, the SoC that powers rivals like the Motorola Atrix and the LG Optimus 2X.

Because Apple designs its own chip and takes it directly to the fabs, it doesn't have to go through a third party like Nvidia or Freescale and pay a hefty markup in the process.

This means that it can afford to design bigger & more complex chips for the same outlay as its competitors. Some have been saying that the mystery surface area is dedicated to hardware acceleration for graphics functions although it is unlikely Apple will ever comment on it.

Gwennap posits that Apple may be forced to design more than one system on chip to cover its different products, possibly playing around with clock speeds as well as core counts.

Also its gargantuan appetite for anything silicon may push it to collaborate with Intel, rather than Samsung Semiconductors, to produce the A5 and possibly the A6.

Désiré has been musing and writing about technology during a career spanning four decades. He dabbled in website building and web hosting when DHTML and frames were en vogue and started writing about the impact of technology on society just before the start of the Y2K hysteria at the turn of the last millennium. Following an eight-year stint at where he discovered the joys of global tech-fests, Désiré now heads up TechRadar Pro. Previously he was a freelance technology journalist at Incisive Media, Breakthrough Publishing and Vnunet, and Business Magazine. He also launched and hosted the first Tech Radio Show on Radio Plus.