Cashe Questions...

I have a few questiopns about Cashe.

1- What is Cashe, i know it is important and how much needed, etc... but what does it do?

2- On a Core 2 Duo. When it says T7500, 2.2GHz AND 4MB Cashe, does that mean a TOTAL (2MBx2) or 4MB PER CORE? Thanks

 

Cache is a collection of data duplicating original values stored elsewhere or computed earlier, where the original data is expensive to fetch (owing to longer access time) or to compute, compared to the cost of reading the cache. In other words, a cache is a temporary storage area where frequently accessed data can be stored for rapid access. Once the data is stored in the cache, future use can be made by accessing the cached copy rather than re-fetching or recomputing the original data, so that the average access time is shorter. Cache, therefore, helps expedite data access that the CPU would otherwise need to fetch from main memory. Wikki is your friend.

The 4MB's you ask about is total the entire amount is shared between the two cores each can access the entire 4MB's (AMD different). There is no set amount for how much is best, but as you keep adding more you do get diminishing returns.

Remember there is L1 and L2. Wikki is a good place to start, then what you don't understand ask.