CPU, RAM & Storage, Explained

The three components that decide whether a computer feels fast - the CPU, the RAM, and the storage - each properly explained, plus the one idea (the memory hierarchy) that ties them together.

1. The CPU - the Worker The CPU runs your programs by repeating one tiny loop - fetch an instruction, execute it, repeat - billions of times a second; clock speed (GHz) is how fast it loops, cores are how many can loop at once, and cache is the sliver of ultra-fast memory that keeps it fed.
2. RAM - the Workspace RAM is your computer's working memory - fast, but wiped the moment the power goes off; it holds whatever's actively in use, and when it runs out the system slows to a crawl as it shuffles data to slower storage to cope.
3. Storage - the Filing Cabinet Storage is where your data lives when the power's off - big and permanent but slower than RAM; capacity is how much it holds and speed is how fast it hands data over, and the memory hierarchy (cache → RAM → storage) ties all three parts together.