Cache memory is a smaller and faster memory component located between the CPU and main memory that stores recently used data to allow faster access than main memory. Registers are the smallest memory locations built into the processor itself that can hold small amounts of data or instructions for direct CPU access and processing at very high speeds. The key differences are that cache is an external memory unit while registers are internal CPU components, and cache is used for reading and writing to main memory while registers temporarily store data for active processing.

1. Cache memory & Registers
By : Aiman Abbas

2. Cache memory
• Cache is a smaller and fast memory component in the computer
which is inserted between the CPU and the main memory. To make
this arrangement effective. The cache needs to be much faster than
main memory. This approach is more economical than the use of fast
memory devices to implement the entire main memory.

3. Cache memory

4. Register
• Register are the smallest holding data elements that are built into
processor itself. These are memory locations that can be directly
accessible by processor. It holds small amount of data around 32-bits
to 64-bits and may hold an instruction, a storage address or any kind
of data such as a bit sequence or individual characters.
• For example : Accumulator register, Program counter, Instruction
register, Address register, etc.

5. Registers

6. Difference between Cache Memory and
Register :
1. Cache is a smaller and fastest memory
component in the computer.
2. Cache memory is exactly a memory unit.
3. It is used during reading and writing
processes from the disk.
4. It is a high-speed storage area for temporary
storage.
5. It copied the recently used data into.
6. It reduces the average memory access time.
7. CPU accesses memory at the faster rate than
register.
1. Registers is a small amount of fast storage
element into the processor.
2. It is located on the CPU.
3. It is used to store and retrieve information
from them.
4. It is used to store data temporarily for
processing and transfer.
5. It holds operands or instruction that CPU is
currently processing.
6. It reduces the time required to find the item
stored in memory.
7. CPU can operate on register contents at the
rate of more than one operation in one clock
cycle.