RAM (Random Access Memory)
What is RAM?
RAM is a type of volatile memory that temporarily stores data and instructions that the CPU needs while running applications. Unlike a hard drive or SSD, RAM is much faster but loses all data when the computer is turned off.
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Key Features of RAM
✔ Fast and Temporary Storage: Provides quick access to data for running applications.
✔ Volatile Memory: Data is lost when power is turned off.
✔ Improves Performance: More RAM allows smoother multitasking and better performance.
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Types of RAM
1. SRAM (Static RAM)
- Faster and more expensive.
- Used in CPU cache (L1, L2, L3).
2. DRAM (Dynamic RAM)
- Slower but cheaper and used in most computers.
- Needs constant refreshing to retain data.
Common DRAM Variants:
- SDRAM (Synchronous DRAM) – Synchronized with the CPU clock.
- DDR (Double Data Rate) SDRAM – Modern versions include DDR, DDR2, DDR3, DDR4, and DDR5.
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RAM vs. Storage (HDD/SSD)
RAM: Temporary, fast, and volatile.
Storage (HDD/SSD): Permanent, slower, and non-volatile.
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