| In this article we're going to review the different | | | | Dynamic Random Access Memory. This is very fast |
| types of computer memory as they do not all | | | | memory which doesn't wait until processing of the |
| function the same way.The most common and most | | | | first bit is completed before moving on to the next |
| often used computer memory is your RAM which | | | | bit. Then we have SDRAM, which is Synchronous |
| stands for Random Access Memory. Random Access | | | | Dynamic Random Access Memory. This type of |
| Memory is considered random access because you | | | | memory takes advantage of the fact that in most |
| can access any cell of the memory at any time for | | | | cases the data that needs to be accessed is |
| any piece of information either for retrieval or | | | | sequentially stored and therefore using a very fast |
| storage if you know the row and column that | | | | method of accessing this memory. The rate of this |
| intersect at that cell. For example: let's say we are | | | | memory is about 528 Mbps, which is extremely |
| working within an Excel spreadsheet and we want to | | | | fast.The opposite of RAM is SAM, or Sequential |
| change the value in cell A1 from 100 to 90. In order | | | | Access Memory. This is memory that has to be |
| to do this the computer has to know where on the | | | | accessed in sequence, one cell at a time until the |
| RAM chip that cell's contents are located. Fortunately | | | | location the user is looking for is found. This memory |
| for the user, it does and the user doesn't have to. | | | | is very good for buffer memory because items |
| Once the change is made the computer replaces the | | | | stored in the buffer are usually stored sequentially |
| contents in RAM, which was the value 100, with the | | | | anyway as the user continues his work. SAM is |
| new value of 90 and leaves it in that location until the | | | | slower than RAM as far as access time goes.Another |
| user decides to change the value again or closes up | | | | type of memory is what is known as ROM or Read |
| the spreadsheet itself. Once that happens, the | | | | Only Memory. Read Only Memory is also known as |
| contents in RAM of that particular location are lost. | | | | Firmware. This is an integrated circuit programmed |
| Hopefully before doing this the user will have saved | | | | with certain data when it is manufactured. ROM is |
| his spreadsheet to his computer's hard drive.RAM can | | | | not only used in computers but in a number of |
| also be broken down into different types. First there | | | | electronic devices like your Xbox or any video game |
| is SRAM, which is Static Random Access Memory. | | | | console box. Without ROM just about any electronic |
| This type of memory is usually used for a computer's | | | | item today that has built in functions simply wouldn't |
| cache memory. Then there is DRAM, which is | | | | work.There are many other different types of |
| Dynamic Random Access Memory. This type of | | | | memory but these are the most common. In future |
| memory has memory cells with a paired transistor | | | | articles we'll go more deeply into how memory in |
| and capacitor which need constant refreshing. Then | | | | your computer and other devices works. |
| there is EDO DRAM which is Extended Data Out | | | | |