System specs as shipped by the manufacturer.
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Maximum memory: 32768MB
Slots: 4 (2 banks of 2)
*Not to exceed manufacturer supported memory.
System utilizes one of the following processors:
3.2GHz Quad-Core Intel Core i5, 3.4GHz Quad-Core Intel Core i5, or 3.5GHz Quad-Core Intel Core i7
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.
Storage drives -- hard drives and solid state drives -- are the permanent memory for the programs and documents on your computer.
Data transfer rate is the rate at which data can be sent or received. This is determined by your motherboard. A drive with a higher transfer rate will only run at the rate of the motherboard's transfer rate.
Cache is a type of working memory that allows the drive to perform faster.
RPM is the rotations per minute of a hard drive which effects the speed of data transfer.
Solid state drives are non-moving memory, so access speed is instant.