This comparison covers Performance Factor Comparison within CPU Performance for GCSE Computer Science. Revise CPU Performance in 3.4 Computer Systems for GCSE Computer Science with 15 exam-style questions and 12 flashcards. This topic appears regularly enough that it should still be part of a steady revision cycle. It is section 6 of 8 in this topic. Use this comparison to connect the idea to the wider topic before moving on to questions and flashcards.
Performance Factor Comparison
| Factor | How It Helps | Limitation | Measured In |
|---|---|---|---|
| Clock Speed | More FDE cycles per second | Heat/power limit (~5 GHz max) | GHz (billions/second) |
| Cores | Multiple tasks simultaneously | Programs must support multi-threading | Number (2, 4, 8, etc.) |
| Cache | Reduces wait time for data | Very expensive, limited space on chip | MB (megabytes) |
Practice questions for CPU Performance
What does clock speed measure in a CPU?
Describe three factors that affect CPU performance.
Quick recall flashcards
What is clock speed measured in?
GHz (gigahertz) - billions of cycles per second
Three CPU performance factors?
Clock speed, cores, cache