CPU Performance (OCR GCSE Computer Science): Flashcards
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15 cards from this deck
What is clock speed?
What is clock speed?
No. of fetch-decode-execute cycles a CPU completes per second
Clock speed measurement unit
Clock speed measurement unit
Hertz (Hz), typically gigahertz (GHz)
What 1 GHz equals
What 1 GHz equals
One billion cycles per second
Calculations per second for 3.6 GHz processor
Calculations per second for 3.6 GHz processor
3.6 billion calculations per second
What is cache size?
What is cache size?
Amount of high-speed memory in CPU for frequently used data
What cache stores
What cache stores
Frequently used data
Effect of larger cache on performance
Effect of larger cache on performance
CPU accesses data more quickly, improving performance
Cache memory location
Cache memory location
Buffer between CPU and main memory
Where CPU checks first for instructions
Where CPU checks first for instructions
Cache memory
Cache access speed compared to CPU
Cache access speed compared to CPU
Similar access speeds to CPU
What does number of cores mean?
What does number of cores mean?
No. of independent processors within a CPU
How cores work together
How cores work together
Simultaneously on multiple tasks
No. of processors in dual-core CPU
No. of processors in dual-core CPU
2
No. of processors in quad-core CPU
No. of processors in quad-core CPU
4
Benefit of more cores
Benefit of more cores
Better multitasking and overall performance