what is ram(random access memory)
Random access memory, or RAM, is one of the most important components of not only desktop PCs, but laptops, tablets, smartphones, and gaming consoles. Without it, doing just about anything on any system would be much, much slower. Even not having enough for the application or game you’re trying to run can bring things to a crawl, or make it so they can’t even run at all.
But what is RAM? In a nutshell, it’s an extremely fast type of computer memory which temporarily stores all of the information your PC needs right now and in the near future. It’s where your computer loads up all of the things it thinks it will need to find out soon, so that when it does need something, it can read it super fast. It’s quite different from your system’s storage, like its hard drive, where information is stored long term.
what is a used of RAM
Because of its volatility, Random Access Memory can't store permanent data. RAM can be compared to a person's short-term memory, and a hard drive to a person's long-term memory. Short-term memory is focused on immediate work, but it can only keep a limited number of facts in view at any one time. When a person's short-term memory fills up, it can be refreshed with facts stored in the brain's long-term memory.
A computer also works this way. If RAM fills up, the computer's processor must repeatedly go to the hard disk to overlay the old data in RAM with new data. This process slows the computer's operation.
types of ram
Integrated RAM are 2 types
sram(static ram)
- dram(dynamic ram)
sram(static random access memory)
sram is made up of CMOS technology and uses six transistors. Its construction is comprised of two cross-coupled inverters to store data (binary) similar to flip-flops and extra two transistors for access control. It is relatively faster than other RAM types such as DRAM. It consumes less power. SRAM can hold the data as long as power is supplied to it.
- SRAM does not need periodic refreshment to maintain data.
- SRAM’s structure is complex than DRAM
- SRAM does not need periodic refreshment to maintain data
- SRAM are used in Cache memory
- SRAM are faster than DRAM
dram (dynamic random access memory)
DRAM stores the binary information in the form of electric charges that applied to capacitors. The stored information on the capacitors tend to lose over a period of time and thus the capacitors must be periodically recharged to retain their usage. The main memory is generally made up of DRAM chips.
- DRAM uses a separate capacitor to store each bit of data
- DRAM needs periodic refreshment to maintain the charge in the capacitors for data
- DRAM’s structure is simplex than SRAM
- DRAM’s are less expensive as compared to SRAM
- DRAM’s are slower than SRAM
- DRAM are used in Main memory.
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