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#21
If you don't realize, all of the memory upgrades are already exhausted for this computer. It can only hold a maximum of 2 gigabytes. This computer already started out with 2 GB of RAM.
You also can't fit another hard drive to your computer, unless you make an external enclosure for it.
Perhaps you did miss it by that much -- PC2-5300
It is DDR2 SDRAM rated at 667 MHz. However the IGD eats some of the preinstalled memory already.