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[* black] The A5 processor has 512 MB RAM, just like the processor in the latest iPod Touch.
[* black] How do we know? The package markings E4064P3PM-8D-5 indicate the A5 has two 33 nm, 2 Gb, LP DDR2 RAM dies inside, according to [http://www.chipworks.com|Chipworks].
[* black] How do we know? The package markings E4064P3PM-8D-5 indicate the A5 has two 33 nm, 2 Gb, LP DDR2 RAM dies inside, according to [http://www.chipworks.com|Chipworks].
[* black] This die photo from Chipworks shows the inner workings of the A5.