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three year old startup called PA Semiconductor

Apple's A4, a system-on-a-chip (SoC) that reportedly combines a low-power CPU, a graphics processing unit (GPU)

Apple A4, a brand new design for a SoC produced and owned by Apple, using the same ARM architecture that powers the iPhone. The A4 runs at 1GHz and supposedly helps the iPad achieve a maximum battery life of 10 hours, thanks to its tight placement of circuitry and small form factor. In integrating a CPU with a GPU, it follows in the footsteps of other energy-efficient SoC processors, like Nvidia's Tegra