What is a CPU multiplier and what does it do?

Main frequency = external frequency * frequency multiplication.

The CPU frequency multiplier below the mainstream level is locked and cannot be adjusted, and overclocking can only be adjusted to achieve the increase of the main frequency.

The audiophile-grade CPU multiplier is adjustable, which increases the upper limit of overclocking.

The full name of the CPU is the frequency multiplication. There is a ratio relationship between the core operating frequency of the CPU and the external frequency, and this ratio is the frequency doubling coefficient, referred to as frequency doubling. Theoretically, the frequency doubling is from all the way to infinity, but it should be noted that the frequency doubling is thought to be an interval unit.

The multiplication of the external frequency and the multiplier frequency is the main frequency, so any increase in either of them can increase the main frequency of the CPU.

Originally, there was no concept of frequency doubling, and the main frequency of the CPU and the speed of the system bus were the same, but the speed of the CPU is getting faster and faster, and the frequency doubling technology is also born. It allows the system bus to operate at relatively low frequencies, while the CPU speed can be infinitely increased by multiplication. Then the calculation method of the CPU clock frequency becomes:

Frequency = Frequency x Frequency Occubation. That is to say, the frequency doubling refers to the multiple of the difference between the CPU and the system bus, when the external frequency remains unchanged, the frequency doubling is increased, and the CPU main frequency will be higher.

A CPU has only one frequency multiplier by default, and the motherboard must be able to support this frequency multiplier. Therefore, it is important to pay attention to this when buying a motherboard and CPU, if the two do not match, the system will not work. In addition, many of the CPU multipliers have been locked and cannot be modified.

CPU frequency doubling, the full name is frequency doubling factor.

There is a ratio relationship between the core working frequency of the CPU and the external frequency, this ratio is the frequency doubling coefficient, referred to as the frequency doubling, theoretically the frequency doubling is from to infinity, but it should be noted that the frequency doubling is thought to be an interval unit, and the multiplication of the external frequency and the frequency doubling is the main frequency, so any one of them can increase the main frequency of the CPU.

It should be noted that there is only one default frequency multiplier of a CPU, and the motherboard must be able to support this frequency multiplier, so you must pay attention to this when purchasing the motherboard and CPU, if the two do not match, the system will not work, in addition, many of the CPU multipliers have been locked and cannot be modified.

When the CPU was first produced, it couldn't be opened once the doubling was locked, unlike the previous K6, which could be hard cracked. There are also processors that do not have a lock multiplier, which is generally packaged in a black box. Turnstiles are used for overclocking.

.Main frequency = external frequency * frequency multiplier, and AMD's CPU is generally 8 or 9 multiplier, and the external frequency is 200, of course, it is super external frequency, and the main frequency can go up.

In addition to the black box version of the CPU,Other frequency doublings can't be adjusted,You can only adjust the external frequency,Tune it in the BIOS,Some motherboards lock the external frequency,You can use CPU-Z to detect your own CPU status,I've also seen a computer with CPU automatic downclocking,Can't solve it,The main reason is that the CPU is too old.,No one likes to help.。

There is no problem with this doubling.

Similar to this kind of CPU, it will automatically reduce the frequency doubling when it is idle to achieve the effect of energy saving.

To correct a point, the frequency doubling is set by the manufacturer, and it cannot be adjusted, only the external frequency.

n It was able to be adjusted a long time ago, but now it's locked, and it can't be tuned, so you can only tune the external frequency, and the external frequency is adjusted in the BIOS.

Currently, more than 90% of CPUs are locked to the multiplier (more than 99% of the CPUs of laptops are locked to the multiplier), which means that you can't adjust the multiplier.

The multiplier will only change within the range set by the manufacturer, and in this case, you can simply set your power mode to "High Performance" and the multiplier will increase.