1.2 - CPU Performance Flashcards

1
Q

What is a cache memory?

A

Temporary storage for frequently used instructions

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2
Q

Describe 2 ways that more cache memory will mean that performance is higher

A

Closer to the CPU than RAM so can provide data and instructions at faster rate. Higher performance because the instructions and data can be accessed quicker

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3
Q

Explain why most computers only have a small amount of cache memory

A

Expensive

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4
Q

What is clock speed and what are its units?

A

Measure of how quickly the CPU can process instructions. Measured in GHz

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5
Q

Explain how a higher clock speed improves performance

A

FDE cycle is performed faster, more instructions can be executed can be processed each second.

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6
Q

Define underclocking and its effects

A

When clock speed is lower than recommended. Computer perform faster but decrease lifespan.

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7
Q

Define overclocking and its effects

A

When clock speed is higher than recommended. Computer perform slower but increase lifespan.

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8
Q

What is a core?

A

Complete set of CPU components. Each core can perform FDE cycle

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9
Q

Why should a quad-core processor have higher performance than a dual-core processor?

A

Can process more instructions simultaneously

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10
Q

Explain why more core doesn’t necessarily mean the performance will be better

A

If one core is waiting for another to finish processing, performance will not increase. Some programmes is not written for multi cores

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