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OCR GCSE Computer Science
1.1 System Architecture
Performance
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What does Cache store?
Frequently used instructions
What is Clock Speed measured in?
Hertz
How many instructions can a 1GHz single core CPU process in one second?
1 Billion
How many instructions can a 1GHz dual core CPU process in one second?
2 Billion
How many instructions can a 2GHz quad core CPU process in one second?
8 Billion
Modern typical Desktop, Notebook, and smartphone CPU clock speed is measured in...
Gigahertz
A 1hz CPU would carry out how many instructions per second?
1 Instruction per second
What is a CPU Core?
A discrete processing unit
Having multiple cores allows the computer to...
Carry out parallel processing
In which stage of the Fetch Decode Execute Cycle is the Accumulator used to store values?
Execute
How does CPU cache help improve performance of a CPU?
It is built into the CPU therefore its quicker to access