9. Cache Memory

CPU Cache

A super-fast internal memory buffer sitting directly next to the CPU that holds instant copies of RAM data so the processor doesn't have to wait for it.

SRAM (Static Random-Access Memory)

The lightning-fast, expensive memory used for CPU cache that holds data without needing constant electrical refreshes.

Level 1 (L1) Cache

The absolute fastest, smallest cache memory located directly inside the individual CPU core itself.

Level 2 (L2) Cache

A slightly larger, slightly slower backup cache assigned to a CPU core to catch data that the L1 cache missed.

Level 3 (L3) Cache

The largest and slowest cache layer on the chip, shared across all CPU cores to catch any data missed by L1 and L2.

ECC (Error-Correcting Code) Memory

High-end memory that checks itself for data errors in real-time and fixes minor single-bit data corruptions automatically.

ROM (Read-Only Memory)

Permanent, unchangeable memory chip that holds the critical startup rules needed to boot up your computer when you press the power button.