Memory Type: DDR3 PC3-8500, DDR3 (non-ECC)
Maximum Memory: 8GB
This 15" system may utilize one of the following processors:
2.4GHz, 2.53GHz, 2.66GHz or 2.8GHz Intel Core 2 Duo 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