Memory Type: SDRAM, PC133, SDRAM (ECC)
Maximum Memory: 64GB
Memory must be installed identically across all 4 memory cartridges, each of which has 8 memory slots divided into 4 banks of 2 slots. Each cartridge supports a maximum of 16GB. A 5th cartridge may be installed for redundancy.Installed in pairs of modules.Minimum of 8 modules need to be ordered at a time. 10 modules need to be ordered if running in Redundancy Mode (using a 5th cartridge)
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