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Introduction to Computer Memory

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on 25 June 2015

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Transcript of Introduction to Computer Memory

Introduction to Computer Memory
Ashraf Mahmud
What is Computer
Memory
Memory is a
device
to store information to use
in a computer

Result get stored
prior to output
Physical memory
Difference between memory and hard disk
Hard disk
/drive is a spindle of magnetic discs that can hold huge space to save documents, files or install a new program.

Memory
is a device where programs load temporary basis inside the computer
You can upgrade memory
Introduction to Computer Memory
Types of Memory
-Random access memory
(RAM)
-Read only memory
(ROM)
Random access Memory
(RAM)
Storing program temporary basis to run programs inside the computer, including the operating system.

RAM can access 100 times faster than a hard drive
RAM

(volatile)
Stores information temporarily,
as long as the Power is there

Two
types of RAM
-
Static
-
Dynamic
Static
-Does not require any additional circuitry to refresh the memory as long as the power is on

-More expensive and faster, e.g- Cache Memory
Dynamic
-Tends to lose data
-Signal tends to die out unless special circuitry is used to refresh even though power is there.
-Comparatively cheaper and slower
-Used as main memory in computer
ROM
(non-volatile)
Stores information even if the Power is off
PROM
Programmable ROM
EPROM
- Electrically
Programmable ROM- E.g. Music CD
EEPROM
- Electrically Erasable Programmable ROM (Flash Memory)
e.g- BIOS (basic input/output system- microprocessor starts system once you turn computer on) Memory
How data save in a memory
With a binary format
0 or 1- bit
8 bits is called byte
4 bytes make address

Current state of RAM
DDR1
with 184 pins, notch is more left
DDR2
with 240 pins, notch is more right
DDR3
with 240 pins, notch is more centre
-1600 MHs bus speed
-Fully buffered DDR3
All types are with non-ECC-8chips
ECC-9 chips, Register ECC- 9 chips +extra buffer chips. Error-correcting code (ECC)
Upgrading
your memory
Upgrade with free of cost- open command prompt cmd>command sfc> scannow>command selecting the number where RAM is written to upgrade or sysrmug /s, it might not work first time, reboot machine several times until it does.
Or physically buy your physical memory card and insert in the PCI slot
Or you can upgrade your virtual memory- right click on my computer>properties> advance system settings>system properties>performance settings>performance option>virtual memory>set amounts
How do you make
your computer fast
Upgrade memory
Removing start up program running in the background- run msconfig>startup>remove unwanted program
Disk clean up-right click on C:>general>properties>cleanup or C:>tools>error checking>or optimize/defragmentation
Download spybot, malwarebyte fron cnet or filehippo
Safe mode running by pressing f8 while restarting the computer
Full transcript