CPU Downclocking Running I would like to ask about the cause and solution

This problem is obvious and there are many situations that make it up.

1.Maybe your version of 849PE,The highest support frequency must be bought from JS。

I think 1 is more likely, because you said that changing the external frequency doesn't work.

There is also a possibility, could it be that the CMOS is out of power?

See if there's a problem with the fan that's causing the CPU to overheat. Overheating will automatically reduce the frequency of protection.

Refresh the motherboard BIOS. Reload the optimal settings.

You have a hard jumper on your motherboard to limit the external frequency.

CPU downclocking is mainly solved from three aspects:

1. System reasons: It may be that the power options of the control panel are set to energy saving or balance modes, and only the high-performance mode can make the CPU better exert its full strength. In addition, it is also possible to disable the turbo option in the BIOS, which is different for each notebook setting, and can be restored to the default by pressing F9.

2. Power supply reason: It may be that the most suitable power supply is used, such as the i7 version of the computer uses the power supply of the i5 i3 version of the computer, resulting in insufficient power supply, and the CPU turbo frequency power supply cannot keep up, so the frequency is reduced.

3. Reasons for heat dissipation: It may be that the heat dissipation system is inefficient due to excessive dust accumulation or the aging of thermal grease, or the level of the heat dissipation system itself is very low, and it is difficult to suppress the temperature of the CPU running at full load. In order to maintain the life of the hardware, it is recommended to clean the ash and replace the silicone grease first, if there is no effect, you can consider adding an exhaust radiator, which can generally solve the problem of temperature.

CPU off auto downscaling method:

Intel's name is Speedstep, and there is also EIST, the full name is Enhanced Intel SpeedStep Technology, and there is also an Enhanced Halt State (C1E AMD's is called Cool).'n'Quiet, the energy-saving frequency reduction technology of the two CPU manufacturers, allows the CPU to determine the frequency doubling according to the usage rate, so as to achieve the purpose of power saving, without human intervention, and will automatically adjust as needed; If you need to turn it off, you need to operate it in the BIOS;

AMD: BIOS to find similar cool'n'Quiet or C&Q options, set to disabled, and press F10 to save and exit;

Intel: Eliminate the pie.

If you find the words like speedstep, dust eist, and c1e, set it to disabled, and then press F10 to save and exit;

<> there are also some adjustments that need to be made in the system.

Click Start in the lower left corner of the computer interface - Control Panel - Power Options.

Select Demo or Keep it on, OK;

You may have installed the auxiliary software of intelligent cooling, energy saving and frequency reduction! Then the CPU heat dissipation is not good, and the over-temperature protective frequency reduction is not possible.

Reset BIOS settings Also, look at the CPU when using the stress test

Is there any setup in the BIOS?

Generally, it can be used with automatic frequency reduction,My main frequency,Usually has been working at 798M frequency,Unless there is a big transaction, it will be turned on at full speedIf you need to manually reduce the frequency,You can see if there are relevant settings in the BIOS settings。

Press the del key to enter the CMOS when you boot up, and you can adjust the CPU frequency inside.

You can use this software...

Select the energy-saving mode in the power mode.