Memory Type: DDR2 PC2-6400, DDR2 (non-ECC)
Maximum Memory: 2GB
Please check the product identification label located on the bottom of the netbook. If the label shows D3 in the upper right hand corner, please order your memory upgrade by selecting the NB505 (DDR3 - D3 Models)
How much memory your Windows OS will recognize depends on which version of Windows you are running. 32-bit versions of Windows will see (and utilize) only 3GB or 3.5GB. To utilize more memory, install a 64-bit version of your OS. More information about OS memory maximums can be found here.
Memory or DRAM is the "working" memory of the computer. It's used to store data for programs (sequences of instructions) on a temporary basis.
video - installing memory