Operating Memory. SDRAM

The computer’s capacity directly depends on three elements: processor, chipset and operating memory. If the processor and chipset are rather expensive and almost unchangeable components of the system, an operating memory could be changed.

Remember that you can get a high-speed and reliable system using a qualitative memory. Before buying it, discover the bus frequency of your computer and the time of delays of desired module.


Nowadays SDRAM often occurs in the form of DIMM (Dual In-Line Memory Module). This memory can be found in middle-class computers.

The least losses when sending data will be observed during synchronous exchange of information between the processor and memory. So when selecting a memory module, pay attention not only to the amount of stored data, but also to a frequency: PC100 – 100 MHz, PC133 – 133 MHz, PC166 – 166 MHz.

Another important parameter of SDRAM is the time delay, connected with searching data in the memory (CAS Latency). This value defines the time needed to search the column with data. This amount is identified by CL on a module and has a value equal to 2 or 3 clocks. CL can be installed using BIOS but, as a rule, if there is a marking “CL=3” on a module, the decreasing of this value leads to an unstable operation of a computer. That’s why, it is better to buy modules with a marking “CL=2” for higher speed of computers.