Memory & StorageComparison
RAM vs. ROM - Complete Comparison
Part of RAM and ROM — GCSE Computer Science
This comparison covers RAM vs. ROM - Complete Comparison within RAM and ROM for GCSE Computer Science. Revise RAM and ROM in Memory & Storage for GCSE Computer Science with 15 exam-style questions and 16 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 6 of 10 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 6 of 10
Practice
15 questions
Recall
16 flashcards
RAM vs. ROM - Complete Comparison
| Aspect | RAM (Random Access Memory) | ROM (Read Only Memory) |
|---|---|---|
| Volatility | Volatile - loses data when power off | Non-volatile - keeps data without power |
| Access Type | Read AND Write (both fast) | Read only (or very slow write) |
| Speed | Very fast (nanoseconds) | Slower than RAM (microseconds) |
| Purpose | Temporary working memory | Permanent storage of essential code |
| Content | Running programs, open files, OS, data | BIOS/UEFI, boot instructions, firmware |
| Change Frequency | Changes constantly (many times per second) | Never or rarely changes (firmware updates only) |
| Size (Typical) | 4GB - 32GB (consumer devices) | Few MB (very small compared to RAM) |
| Cost per GB | Moderate (but getting cheaper) | More expensive per GB |
| User Interaction | User indirectly controls (opening programs) | User rarely interacts (firmware updates only) |
| Essential For | Running programs and multitasking | Starting the computer (boot process) |