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What does cache mean exactly?

This is a discussion on What does cache mean exactly? within the RAM and Power Supply Support forums, part of the Tech Support Forum category. I'm looking at computers and I see some say this below. And Iv'e always wondered what "cache means" 6mb of


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Old 06-30-2016, 09:03 AM   #1
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I'm looking at computers and I see some say this below. And Iv'e always wondered what "cache means" 6mb of cache is and does what?




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Old 06-30-2016, 09:27 AM   #2
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Old 06-30-2016, 10:19 AM   #3
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A cache is a place to store something temporarily in a computing environment, basically is a smaller faster memory.
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Old 06-30-2016, 11:32 AM   #4
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Intel® Core™ i5-4570S Processor (Quad Core, 6MB Cache, 2.90GHz Turbo, w/ HD 4600 Graphics)
In this context, the cache is a small amount of fast memory built into the die of the cpu. Cpu uses it to store copies of frequently used data from main memory. Enables reduction in the time it takes to access data from the main memory.

As is usually the case when we speak of memory, more is better.
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Old 06-30-2016, 08:32 PM   #5
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I see. Thank You for the responses ;-) Now I have an understanding of it ;-)
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Old 07-01-2016, 01:19 PM   #6
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In general terms a cache is fast storage that contains frequently accessed data in larger but slower storage. This minimizes the need to go to main storage and results in better performance. Caching is used a great deal in modern computers.

Since some time in the 1980's CPU speeds began to exceed that of RAM storage and the gap has widened greatly since then. Providing RAM that could keep up with modern CPU speeds would be prohibitively expensive. Even the laws of physics make this impractical if not impossible. Some sort of cache is necessary to avoid seriously degraded performance.

To solve the problem modern CPUs have a Level 1 cache that contains a small subset of data in main RAM memory. It is very fast but for practical reasons must be very small in size. This helps, but not enough. So a second Level 2 cache is added. This is much larger than the Level 1 cache but quite a bit slower, but still faster than main memory. It is generally in the CPU case but separate from the CPU itself. This is the cache mentioned in the CPU specifications. Many modern CPUs have added a Level 3 cache.
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Old 07-15-2016, 09:50 PM   #7
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Very interesting stuff ;-) Thank You for the posts. I have a much better understanding now ;-) Thanks again!
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