Registers & Cache Memory

Registers

In computer architecture, a process register is a small amount of storage available on the CPU whose contents can be accessed more quickly than storage available elsewhere. And the registers are very fast. This is a temp. Memory in CPU. IT holds data that needed for ALU (execution)

Cache Memory

Cache is high-speed access area that can be either a reserved section of main memory or a storage device. Cache is portion on memory of high-speed static RAM (SRMA) and is effective because most programs access the same data or instructions over and over.

Level 1 caching

 Also known as L1 cache, primary cache, or internal cache. When referring to computer processor, L1 cache is cache built on to the processor and is commonly the fastest cache in the computer.

Level 2 caching

Short for Level 2 caching, L2 is also commonly referred to as secondary cache or external cache. Unlike Level 1 cache, L2 cache is commonly located on the motherboard, although with most new processors it is being found on the processor. When L2 cache is found on the processor, if cache is found on the motherboard, it is properly known as L3 cache.

First introduced with the Intel Pentium Pro computers. In some cases this required that the user installed optional L2 cache for L2 support. L2 cache on computers can range from 64KB to 8MB in size. However, early versions of the Intel Celeron had no L2 cache.

Level 3 caching

Type of cache that is found on the motherboard instead of the processor. Cache on the processor is known as L2 cache.