Cache Memory (CPU Performance)
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What does RAM stand for?
Random Access Memory
What is RAM?
RAM is the type of memory used as the computers main memory
Why can’t you just get fast memory?
Because it starts to get quite pricey
What is one way of improving speed at minimal cost?
To use a small amount of cache
What is cache known as between the main memory and the processor?
The intermediary
Why does data get accessed quicker from the cache?
Because it is closer to the CPU
If the information is not located in the cache where is it fetched from?
RAM
How much RAM does a typical PC have?
8 to 16GB
How much cache does a typical PC have?
2MB
How many megabytes in a gigabyte?
1000
The more cache a computer has the more…?
Data and instructions can be held in the cache and made available very quickly
What is level 1 cache?
Level 1 cache is extremely fast but small. Thus speeding up the Fetch-execute cycle
How much storage does level 1 cache have?
2 to 64KB
What is level 2 cache?
Level 2 cache is fairly fast still and medium-sized
How big is level 2 cache?
256KB to 2MB
Explain how speed and cache memory can affect performance and speed of a computer.
The faster the cache memory the more quickly instructions can be fetched decode and executed on a second
What type of memory is the most expensive?
cache