What is the difference between hard drive and memory? What performance indicators do they have?

Difference: 1. The memory is where the computer runs, and the hard disk is used to store temporarily unused information; 2. The information in the memory will disappear when the power is turned off, but the information in the hard disk can be stored for a long time. Hard drive performance indicators include hard drive capacity, hard drive speed, hard drive rotation speed, interface, cache, hard drive single disk capacity, etc.; memory performance indicators include capacity, frequency, and latency values.

Memory: Memory is also called main memory. The running of programs in the computer is carried out in the memory. As long as the computer is running, the computer CPU will The required calculation data is transferred to the memory for calculation. Usually memory is divided into random access memory (RAM), read-only memory (ROM), and cache (CACHE).

Hard disk: From the perspective of the computer's structural system, the hard disk should be regarded as the "external memory" of the computer.

The difference between memory and hard disk

The main difference between memory and hard disk is the following three points:

1. Memory is a computer In the operating place, the hard disk is used to store temporarily unused information;

2. The memory is made of semiconductor materials, and the hard disk is made of magnetic materials;

3. In the memory The information will disappear when the power is turned off, and the information in the hard disk can be saved for a long time.

Performance indicators of memory and hard disk

Performance indicators of hard disk include hard disk capacity, hard disk speed, hard disk rotation speed, interface, cache, hard disk single disk capacity, etc.

Memory performance parameters: capacity, frequency, latency value.

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