Abstract
- Also known as RAM (Random-access Memory)
- Made of Memory Element, which can be assessed using Physical Address in a Random Access Addressing manner which is very efficient, and we use Memory Frames for easier memory management
Important
Data stored is lost when power is off!
Memory Element
- A device which can remember value indefinitely
- Change value on command from its inputs
- A basic unit of storage element, able to store 1 Bit
- 2 Types - Latch & Flip-flops
Physical Address
- The address that points to a collection of Memory Element
- Usually one physical address points to 8 memory elements to form one Byte
Memory Frames
- Fixed-size blocks that are obtained by dividing the Main Memory
- All frames share the same size
- Size determined by the Kernel & Instruction Set Architecture (ISA)
- Represent actual Main Memory blocks that hold Data & Instruction
SRAM
- Stands for Static Random Access Memory
- A type of Main Memory characterised by its fast access speeds, but generally higher cost and lower density (stores less data per unit area)
- Commonly used to build CPU Cache and Register etc
Important
- SRAM will hold its data permanently in the presence of power
- Faster than DRAM
DRAM
- Stands for Dynamic Random Access Memory
- The ‘RAM’ that is commonly known to the consumers
Important
Important
DDR SDRAM is the DRAM that is commonly found in our machines, the common size is 8GB and 16GB.
GDDR SDRAM is the DRAM that is commonly found in GPU, supports high volume of data transfer.