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I am running Windows 7 Professional x64 on a Lenovo N500 42336BU machine. I would like to know the maximum capacity of ram I can install on it.

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4 GB max, you should just paste the model number into google, the result comes right up. But yes.. 4GB max on that unit.

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What if the PC is a custom build and the End User doesn't know the Motherboard type? Your method is viable for branded computers but there are exceptions – Joe Taylor Nov 16 '10 at 17:34
Should I be answering a specific question for ALL possible computer types as well? your being unreasonable now... – Jakub Nov 16 '10 at 17:56
Just pointing out that the method has flaws. That's all. Now the questions changed your answer is 100% correct. – Joe Taylor Nov 16 '10 at 18:00 says the Lenovo 3000 N500 series laptops max out at 4096 MB (4GB) of RAM

You can get to this page by using the pull-down menus at homepage to select your PC's Manufacturor, Product Line, and Model.

Alternatively, their scanner will automatically detect your computer type and tell you which RAM slots are available for upgrade. Seems to only work with IE, though.

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