Memory Type: DDR3 PC3-8500, DDR3 (non-ECC)
Maximum Memory: 8GB
This 15" system may utilize one of the following processors:
2.4GHz or 2.53GHz Intel Core i5 or 2.66GHz Intel Core i7 processor.
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