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This is the SDRAM inside the A4. Yes, that's a Samsung logo. No, that doesn't mean Samsung designed the A4—just the RAM.

Samsung's 1 Gb mobile DDR SDRAM (x2)

The part number on each die is K4X1G323PE.

Decoding this part number shows there is 2Gb of memory inside. This translates into ~128MB of memory per die, for 256 MB total.

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