you’re free to know the DDR RAMs history and specifications.
There are different types of RAM, such asDRAM memoryandSRAM memory.
And this post focuses on DDRSDRAM.
Definition of DDR RAM
What is DDR SDRAM?
It is short for Double Data Rate Synchronous DynamicRandom-Access Memory, which can be used in computers.
Implementations often have to use schemes such as phase-locked loops and self-calibration to achieve the required timing accuracy.
For example, a 64-bit data bus forDIMMsrequires eight 8-bit chips addressed in parallel.
Several chips with the common address lines are called a memory rank.
The purpose of introducing this term was to avoid confusion with chip internal rows and banks.
A memory module can carry more than one rank.
Chip Characteristics
The size of the chip is measured in megabits.
If most motherboards contain 64M 8 chips (low density), only 1 GB modules can be recognized.
If you use 128M 4 (high density) 1 GB modules, they most likely will not work.
High-density memory modules are assembled using chips from multiple manufacturers.
High-density chips can be identified by the number on each chip.
High-density RAM devices are designed to be used in registered memory modules of servers.
The JEDEC standard does not apply to high-density DDR RAM in desktop implementations.
