CPU Performance Explained! Clock Speed, Cores & Cache | OCR J277 Computer Science

Want to finally understand what makes one computer FAST and another painfully slow?

In this video, we break down the three major factors that affect CPU performance for your OCR GCSE Computer Science J277 exam:

Don't forget to check out the other videos in this series - browse the GCSE Computer Science course playlist here: https://www.youtube.com/playlist?list=PLFh1-6PmVS7bXmbHS9GwV8e6yRFaFvIBn

🔹 Clock Speed – how fast each core processes instructions
🔹 Number of Cores – how many tasks the CPU can handle at once
🔹 Cache Size – how quickly the CPU can access data

You’ll learn:
✅ What each characteristic does
✅ How changing clock speed, cores or cache affects performance
✅ Why some CPUs are better for gaming, multitasking or school work
✅ How bottlenecks occur and why the “dream combo” matters
✅ Clear examples and exam-ready explanations for OCR J277 (1.1.2)

Perfect for:
🎓 GCSE Computer Science students
📚 OCR J277 exam revision
💻 Anyone wanting to understand how CPUs actually work

📘 OCR J277 Topic Covered:

1.1.2 – Factors Affecting CPU Performance, including Clock Speed, Cores and Cache Size

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