Difference between Random Access Memory (RAM) and Hard Disk Drive (HDD)
Similarities between RAM and HDD :
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- Both are used for storage of data.
- Both are physical components of the computer machine.
Differences between RAM and HDD :
|Full Form||RAM stands for Random Access Memory.||HDD stands for Hard Disk Drive.|
|Also known as||RAM is also known as primary memory.||HDD is also known as secondary memory.|
|Components||RAM does not contains, mechanical parts, only electronical parts like transistors.||HDD contains moving mechanical parts, like the arm.|
|R/W Time||RAM has shorter R/W time.||HDD has longer R/W time.|
|Memory Access||In RAM each and every element takes same time to be accessed.||In HDD different elements take different time to be accessed.|
|Size||In a system the RAM is smaller than the HDD.||In a system the HDD is larger than the RAM.|
|Cost||RAM is costlier per unit storage.||HDD is cheaper per unit storage.|
|Noise||RAM does not produces noise.||HDD can produce noise due to mechanical movements.|
|Duration of Data||Data stored in RAM is temporary. It remembers as long as it has electricity, i.e. the power is on.||Data stored in HDD is permanent, i.e. it retains data even after shutdown.|
|Speed of Computer||Inadequate RAM slows down the speed of the computer.||HDD does not affect the speed of the computer.|