Definition
RAM is a IC(Integrated Circuitry) type volatile memory who’s full form is Random Access Memory. The Random word in the name signifies that the piece of information on the RAM can be accessed from any part. It don’t cares that where was previous information. RAM contains the most important data needed by running processes of the CPU. It is the fast, costly and small memory. That’s why it also named as the main memory of the computer system.
Types of RAM
The following are some common types of RAM:
- SRAM(Static random access memory)
- It is commonly used for cache which is fastest memory lies between RAM and Processor. It is generally made up of transistors.
- DRAM: (Dynamic random access memory)
- This type of memory is used where memory refreshing is required with higher rate because it contains transistors and capacitors.
- DDR SDRAM(Double data rate synchronous dynamic RAM)
- It is same as SDRAM except greater speed.
- SDRAM(Synchronous dynamic random access memory)
- SDRAM is about five percent faster than EDO RAM. It is the most common form in desktops today.
- EDO-DRAM(Extended data-out dynamic random access memory)
- . It is about five percent faster than FPM
- FPM DRAM: (Fast page mode dynamic random access memory)
- It is a DRAM type memory.
Working
RAM as name implies is random access memory in which data is stored in the form of memory cells that can be accessed in random order. The data is searched in each memory cell until the needed data is found. If data is not found then it is brought to the RAM for future use.
A RAM is an integrated circuit (IC) made of millions of transistors and capacitors, similar to a microprocessor. In the most of cases computer memory is consist of transistor and a capacitor pairing to represents a single bit of data. The capacitor holds the bit of information and transistor acts as a switch to control circuitry on the memory chip, so as to read data from capacitor or to change the ddata of the capacitor.
A capacitor act as a small bucket to store electrons. In order to store the binary information 1 in memory the capacitor is filled with the electrons and to store 0 it is emptied.But ther is a leak problem so for this either the CPU or the memory controller has to recharge all of the capacitors holding a 1 before they discharge. In order to recharge the capacitor the memory contoller needs to read the capacitor with data. This is called as refereshing of the memory and it occurs thousands of time in second
Criteria for buying the RAM
While going for the RAM we have keep in mind the following points -
Vendor Selection
Go for the reputed and fixed vendor for better quality and assurance of the product
Type of work computer has to do
- For gaming go for faster, latest memory
- As a professional go for best
Memory Size
Memory are of 2GB and higher in these day so you must have to decide the size if the memory for your use
Technical Support
We must have to check out the technical support provided by the vendor with the terms and conditions.
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