Memory Type: DDR3 PC3-14900, DDR3 (ECC)
Maximum Memory: 256GB
Your system may support multiple memory configurations based on the density, quantity and type of memory modules installed. Please consult the documentation for your specific system.
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