Memory Type: DDR3 PC3-8500, DDR3 (non-ECC)
Maximum Memory: 8GB
Slots: 2
Each memory slot can hold DDR3 PC3-8500 with a maximum of 4GB per slot.*
*Not to exceed manufacturer supported memory.

Although the memory can be installed one module at a time, the best performance comes from using matched pairs of modules.

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