Single-channel DDR3 SDRAM support with one soDIMM module:
Up to 1 GB of DDR3 system memory (for Windows® 7 Starter for small notebook PCs)
Up to 2 GB of DDR3 system memory (for other operating systems)
So it will depend on the shipping configuration of your system.
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Please join me in congratulating IronFly who is the first Acer Community Member to achieve the rank of ACE Pathfinder. IronFly has shown a consistent willingness to help others and has worked hard to earn this new Rank. Congrats and Thank You IronFly.