OCR GCSE Computer Science J277
Paper 1
Click the button to choose your topic.
1.1.1 Architecture of the CPU
1.3.1 Networks and topologies
1.1.2 CPU performance
1.3.2 Wired and wireless networks, protocols and layers
1.1.3 Embedded systems
1.4.1 Threats to computer systems and networks
1.2.1 Primary storage (memory)
1.4.2 Identifying and preventing vulnerabilities
1.2.2 Secondary storage
1.5.1 Operating systems
1.2.3 Units
1.5.2 Utility software
1.2.4 Data storage
1.6.1 Ethical, legal, cultural and environmental impact
1.2.5 Compression
© Nichola Wilkin Ltd.
CPU performance
What unit is clock speed measured in?
What does clock speed measure?
How does higher clock speed affect performance?
What is cache in a CPU?
Hertz (Hz), usually GHz.
How many CPU cycles happen per second.
More instructions can be processed per second
Small, fast memory storing frequently used data and instructions.
Read the question, think of your answer then click the card to flip it and check if you're correct.
Why might higher clock speed not always mean faster overall performance?
How can clock speed, cache size and cores work together to improve performance?
How do more cores improve performance?
When do extra cores help most?
How does a larger cache affect performance?
What is a CPU core?
Other bottlenecks like RAM speed, storage or software limits can slow things down.
Fast cycles plus quick data access plus parallel processing boosts overall speed.
More tasks can be processed at the same time.
When software is multi-threaded or lots of programs run at once.
Reduces time waiting for data from RAM, so programs run faster.
An independent processing unit inside the CPU.
© Nichola Wilkin Ltd.
This is a sample only so you can see the style.
Some flashcard decks are not included in this sample.
© Nichola Wilkin Ltd.
Terms and Conditions
How you can use these flip cards (teacher licence)
- You may not use this sample resource with your own classes, it is only for review purposes.
- You can share the link with staff within your educational establishment.
Please do not share it outside your educational establishment
- Please do not send the link to other schools, teachers or individuals outside your establishment.
- Please do not upload it to the open internet or anywhere the general public can access it.
Want to recommend it to another teacher? If you think another teacher would love this, please encourage them to purchase their own copy. It is a small thing that makes a big difference to a small business and it helps me keep creating high quality resources for busy teachers.
Terms and Conditions
Read the full Terms and Conditions here: nicholawilkin.com/terms
Check out my knowledge organisers and revision lessons for even more support with your revision.
© 2026 Nichola Wilkin Ltd. All rights reserved.
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Created on January 25, 2026
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Transcript
OCR GCSE Computer Science J277
Paper 1
Click the button to choose your topic.
1.1.1 Architecture of the CPU
1.3.1 Networks and topologies
1.1.2 CPU performance
1.3.2 Wired and wireless networks, protocols and layers
1.1.3 Embedded systems
1.4.1 Threats to computer systems and networks
1.2.1 Primary storage (memory)
1.4.2 Identifying and preventing vulnerabilities
1.2.2 Secondary storage
1.5.1 Operating systems
1.2.3 Units
1.5.2 Utility software
1.2.4 Data storage
1.6.1 Ethical, legal, cultural and environmental impact
1.2.5 Compression
© Nichola Wilkin Ltd.
CPU performance
What unit is clock speed measured in?
What does clock speed measure?
How does higher clock speed affect performance?
What is cache in a CPU?
Hertz (Hz), usually GHz.
How many CPU cycles happen per second.
More instructions can be processed per second
Small, fast memory storing frequently used data and instructions.
Read the question, think of your answer then click the card to flip it and check if you're correct.
Why might higher clock speed not always mean faster overall performance?
How can clock speed, cache size and cores work together to improve performance?
How do more cores improve performance?
When do extra cores help most?
How does a larger cache affect performance?
What is a CPU core?
Other bottlenecks like RAM speed, storage or software limits can slow things down.
Fast cycles plus quick data access plus parallel processing boosts overall speed.
More tasks can be processed at the same time.
When software is multi-threaded or lots of programs run at once.
Reduces time waiting for data from RAM, so programs run faster.
An independent processing unit inside the CPU.
© Nichola Wilkin Ltd.
This is a sample only so you can see the style.
Some flashcard decks are not included in this sample.
© Nichola Wilkin Ltd.
Terms and Conditions
How you can use these flip cards (teacher licence)
- You may not use this sample resource with your own classes, it is only for review purposes.
- You can share the link with staff within your educational establishment.
Please do not share it outside your educational establishment- Please do not send the link to other schools, teachers or individuals outside your establishment.
- Please do not upload it to the open internet or anywhere the general public can access it.
Want to recommend it to another teacher? If you think another teacher would love this, please encourage them to purchase their own copy. It is a small thing that makes a big difference to a small business and it helps me keep creating high quality resources for busy teachers. Terms and Conditions Read the full Terms and Conditions here: nicholawilkin.com/terms Check out my knowledge organisers and revision lessons for even more support with your revision.© 2026 Nichola Wilkin Ltd. All rights reserved.