What is RAM : Computer Science

 What is RAM ?

RAM - Random Access Memory

RAM is a hardware device that allows information to be stored and retrieved on a computer.

Random Access Memory is a form of computer memory that can be read and changed in any order , typically used to store working data and machine code .

Usually more than 1 bit of storage is accessed by the same address and RAM devices ofter have multiple data lines and are said to be 8 bit etc devices .

Today RAM takes the form of integrated circuit ( IC) chips with MOS ( Metal oxide semiconductor) memory cell .

Types of RAM :

1. Static RAM (SRAM)

2. Dynamic RAM (DRAM)

RAM is found in server ,PCs , tablets , smartphones , and other devices such as printer .

DRAM :

DRAM is typically used for the main memory in computer devices .

Dynamic indicates that memory must be constantly refreshed or it will lose its content .

DRAM - Or SDRAM

In general the more RAM a device has the faster it will perform .

SRAM :

SRAM is said to be static because it doesn't need to refreshed , unlike DRAM . 

SRAM is faster than DRAM.

Both types of RAM are volatile , meaning that they lose their contents which the power turn off.

 1MB = 1024 KB

1GB = 1024 MB 

1TB =1024 GB

1PB = 1024 TB

KB - kilobytes

MB - Megabytes

GB - Gigabytes 

TB - Terabytes

PB - Petabytes

Why 1 MB = 1024 KB ,not 1000 KB ?

Answer , computers are based on the binary system.that means hard devices and memory are measured in power of 2 .

What is RAM Latency ?

A delay in transmitting data between a computer's RAM and it's processor .

Since RAM  is not necessary fast compoted to the processor .