How and Why CPU Cache is faster than Ram!!!

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Hi,

I am a bit confused about CPU Cache and Ram..It is said  that L1 cache is faster than L2,L3 cache as well as Ram because it is smaller and less latency than any one,then why increasing RAM enhances the speed of CPU?

As we will increase RAM, then latency should be longer than small RAM size (e.g less latency of 512MB than 1 GB)…Instead of it we can increase cache size so that all instruction should be executed faster and with less latency, then why more RAM is included.

I think my question is some complex but  can some one satisfy me please.

Best Regards,

Junaid Shehzad

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Answered By 90 points N/A #177656

How and Why CPU Cache is faster than Ram!!!

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Hi there

CPU cache is used by CPU to minimize the average time to access memory. Cache is designed for store copies of the data which mostly used by main memory. (RAM is a main memory).

So in order to do this it should be faster.

RAM is designed to perform the necessary task during the computer is working and it helps to access the stored data and it stores in RAM for a limited time period.

Taylor B Campus

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