please suggest me

[Jackson1]

What about the Cache memory? and it usage?

[jank858]

Cache memory consist of small blocks of memory located directly on and next to the CPU chip.

The memory blocks hold places for recently or frequently used instructions or data that the CPU needs the most. The cache memory can retrieve information faster than the RAM.

[pravinp]

Hi Jackson1,

a cache memory can be part of anything which process the data. CPU / graphics card. etc. Now cache memory holds data temporarity and is much much much faster. so when cpu wants to do some process ( say open word document ) - it first tries to look into cache - if it finds process to open word document there it quickly grabs it process it and shows you word. now if you have word document already open - cache memory may have files for that one... if word document is not open - cpu will have to give orders to get files from hard drive or RAM and then store in cache memory and open it... so cache memory is important to the overall performance of computer.

cache memory is shared between all the processes - operating system files to calculator(if you open it) ... so chances are more cache memory - more faster cpu performs. (In theory) ... it is like a small hub - which does not hold anything but without which no one can have access to warehouse. more the hub capable of handling traffic - better the performance.

[Pollux]

The cache on your CPU has become a very important part of today's computing. The cache is a very high speed and very expensive piece of memory, which is used to speed up the memory retrieval process. Due to its expensive CPU's come with a relatively small amount of cache compared with the main system memory.
Without the cache memory every time the CPU requested data it would send a request to the main memory which would then be sent back across the memory bus to the CPU. This is a slow process in computing terms. The idea of the cache is that this extremely fast memory would store and data that is frequently accessed and also if possible the data that is around it. This is to achieve the quickest possible response time to the CPU.
hat is a one level cache system which is used in most hard drives and other components. CPU's however use a 2 level cache system. The principles are the same. The level 1 cache is the fastest and smallest memory, level 2 cache is larger and slightly slower but still smaller and faster than the main memory.
If you can only afford to speed up a small fraction of the total memory, it's a good idea to arrange for the computer to use the fast memory more often than it uses the slow memory. A memory cache is one way to do this.