Computer Memory—Identification, Testing and Replacement

Posted by admin on April 26, 2012 in Computer Memory |

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Computer Memory—Identification, Testing and Replacement

www.remusnet.com Laptop Memory—Identification, Testing and Replacement Laptop memory is Random Access Memory (usually known by its acronym, RAM). It is also called SO-DIMM, which stands for Small Outline Dual In-line Memory Module. This is a type of computer memory is built using integrated circuits. In case your laptop is behaving erratically, it is the SO-DIMM that you actually need to upgrade or replace, in case this kind of memory is installed by laptop manufacturers. There are quite a few laptop memory types that are currently in use. These include:- • SIMM • SDRAM • DDR SDRAM • DDR2 SDRAM • DDR3 SDRAM Early desktop and portable computers used SIMM as their memory modules, but nowadays it is difficult to find any device with this kind of memory. The SDRAM modules became popular in laptops from the year 2000. Today, you can commonly find them in IBM’s machines such as T20, T21, T22, etc. They can be identified with a notch in the middle of the connector as shown in the picture. Now, SDRAM has also become history just as its predecessor SIMM, because of its slow performance. The next step in the evolution of laptop memory was DDR SDRAM. However, this was not backward-compatible, and hence it could not be used on older machines. This memory offers a data transfer rate of up to 3200 MB/s. You could recognize DDR2 SDRAM with the notch as well, but in these memory modules, the notch is located more toward one side than in the DDR SDRAM modules. DDR2 offers a data transfer

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