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

1. RAM
BASIC TO ADVANCE IN COMPUTER BASIC
SERIES.

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)

7. Channels in RAM
Channel
Single
Channel
Dual
Channel

8. How to Select Good
RAM ?
 Frequency ( 1600MHz , 3200MHz ).
 Channel ( Single Channel & Dual Channel ).
 Pricing ( RS = 500 , 1000 , 1600 , 4500 , 6500 ).
 Capacity ( 2GB , 4GB , 8GB , 16GB & 32GB ).
 Generation ( DDR4 or DDR3 ).
 Brand ( Samsung , XPG & Corsair ).

9. THE END