The performance indexes of the memory include specifications, operating frequency, capacity and CL delay.

Specifications such as DDR, DDR2, DDR3 and DDR4. DDR4 is the most advanced.

The working frequencies are 2800MHz, 2666MHz, 2400MHz, 2 133MHz, 2000MHz, 1866MHz, 1600MHz, 1333MHz, 1066MHz, and so on. The higher the frequency, the faster the speed.

The capacity is 5 12MB, 1GB, 2GB, 4GB, 8GB, 16GB, etc. A larger capacity is good.

CL delay, such as 2-2-2-5, 10- 10-30,11-. The smaller the number, the shorter the reaction time.