PPT ABOUT THE RANDOM ACCESS MEMORY . It is used in operating system it is very useful
Random-access memory (RAM; /ræm/) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code.[1][2] A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement.Random-access memory (RAM; /ræm/) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code.[1][2] A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement.Random-access memory (RAM; /ræm/) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code.[1][2] A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement.
Random-access memory (RAM; /ræm/) is a form of electronic computer memory that can be read and changed in any order, typically used to store working data and machine code.[1][2] A random-access memory device allows data items to be read or written in almost the same amount of time irrespective of the physical location of data inside the memory, in contrast with other direct-access data storage media (such as hard disks, CD-RWs, DVD-RWs and the older magnetic tapes and drum memory), where the time required to read and write data items varies significantly depending on their physical locations on the recording medium, due to mechanical limitations such as media rotation speeds and arm movement.
Random-access memory (RAM; /ræm/) is a form of electronic computer memory that can be read and changed in an
2. Content
What is RAM ?
Kinds of RAM
Evolution of RAM
Channels in RAM
How to select good RAM ?
3. What is RAM ?
Main Memory or Temporary Memory
Multitasking
Performance
4. Kinds of RAM
RAM
Statics RAM (SRAM)
Dynamic RAM
(DRAM)
Synchronous
Dynamic RAM
(SDRAM)
Single Data Rate
Synchronous
Dynamic RAM (SDR
SDRAM)
Double Data Rate
Synchronous
Dynamic RAM (DDR
SDRAM)
5. Kinds of RAM
Statics RAM (SRAM)
Expensive
Low power consumption & Faster access speed
Example :- LCD screens, Router and Printers.
Dynamic RAM (DRAM)
Low manufacturing cost
High power consumption
Example :- Video game console & Networking hardware.
Synchronous Dynamic RAM (SDRAM)
Sync with cpu
Pipelining (read & write new instructions after finishing previous one)
Example :- Computer memory & Video Consoles.
SDR SDRAM :- Single data rate
DDR SDRAM :- Double data rate
6. Evolution of RAM
DDR1 SDRAM ( Frequency 200MHz)
DDR2 SDRAM ( Frequency 533MHz)
DDR3 SDRAM (Frequency 800MHz)
DDR4 SDRAM ( Frequency 1600MHz)
