(H8) Day3 Hardware Basics part2 RAM and ROM Difference, RAM

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RAM and ROM
Primary Memory - RAM and ROM
RAM ROM
Random Access Memory Read Only Memory
Temporary Permanent
Volatile memory Non volatile memory -NV
When power off - data lost Data available even power is off
Ex. hdd, SSD, PENDRIVE, SD CARD
Can changeable add/remove/replace - fixed CHIP on MB
RAM (Random Access Memory) - Main memory / Physical memory
Primary Storage for the CPU
Integrated Circuits are used to Temporarily Store Programs, Instructions and Data.
It is a Volatile Memory (Requires Power to Store the Data).
RAM
Static RAM Dynamic RAM
SRAM DRAM ECC EDO VRAM
-CACHE MEMORY SDRAM
--build inside of cpu DDR-SDRAM
DDR2
DDR3
DDR4
DDR5 - Intel 12th gen i3,i5,i7
RAM Specifics
Size : MG, GB, TB , ex. 4GB, 8GB, 16GB
Speed - MHz ex. 1333MHz, 1600MHz,
Model: DDR3, DDR4.,
Voltage Level
To upgrade/ replace RAM
Check CPU Model Specification - Support - Size, Speed, Memory Types
Check Motherboard Specification - No of RAM Slots, Memory Type
Voltage levels - L /H- 1.5v, 3v
Matches to old RAM
Frequency Matches
Type of Package
DIP
SIMM - Single In-line Memory Module
DIMM - Dual In-line Memory Module - Desktop
RIMM - Rambus In-Line Memory Module
SO-DIMM - Small Outline DIMM (Laptop, Mini PC)
Types of Dynamic RAM
SD-RAM (Synchronous Dynamic) 168 Pins
DDR-RAM (Double Data Rate) 184 Pins
DDR2-RAM (Double Data Rate) 240 Pins
DDR3-RAM (Double Data Rate) 240 Pins
Start PC - Press Power button - system perform POST (Power On Self Test) operation to make sure all primary device(CPU, RAM, MB .,)
POST Success - next step of Boot Processing
POST Failure - troubleshoot
If POST Failure - Nothing on Monitor(Blank Screen) , Continues Beep Sound,
No KeyBoard LED Blink.,
Mostly RAM loose connection, RAM Failure, Dust on RAM & RAM Slots
Disconnect Power Card connection, open Cabinet, Remove RAM, clean RAM Edged with Eraser, Clean Dust on RAM & RAM Slots
Connect RAM and start PC, verify Cross verify with other PC’s