Well, the story isn't over yet! To make things more confusing, there are many types of RAM of different makes and models, which differ in performance. It is usually advised to buy RAM from reputed vendors, instead of saving some bucks by settling for some cheap unbranded RAM which will surely make you spend a lot more later on. Frequent hanging, sudden death of RAM chip, pathetic performance and possible hardware damage are the risks posed by these unbranded chips as they undergo no quality tests, while their branded counterparts enjoy lifetime warranties with rock solid stability and tension free high quality performance.
Coming to the type of the RAM, it is your motherboard that will determine what RAM it will take. The best forms currently available are DDR-SDRAM, (Doubled Data Rate SDRAM). Data is transferred in both the increasing cycle and the decreasing cycle as opposed to only once in the normal SDRAM, thus doubling the data transfer. Another reputed name is the RDRAM, (Rambus DRAM) which is quad pumped that is it transfers four times the data using a 100 MHz bus, thus giving a performance equivalent to that of a 400 MHz bus. This technology is currently being used only in the Pentium 4 and is yet to gain momentum. Whatsoever you choose, the ones you should forget are- the EDO ram, Fast Page Mode Ram, Normal Ram which are better off as a part of history.
The moral of the story is, more the RAM faster the system.
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