S9 mining machine violent fan sound

1. No matter what kind of computer, noise is basically a fan problem. If you can't clean up the st on the fan, replace it

2. Hello
What miner are you talking about? Is it the S9 of bitcoin ant miner
if your miner is a small ant series miner, you can rece the noise by changing the fan and appropriately recing the chip frequency. But it's still very difficult to keep quiet.
if you have a large amount of electricity, you can choose a professional hosting mine company for hosting. The electricity charge will be cheaper than that of residents, and you don't need to worry about noise problems, which will cause complaints from neighbors.
if you need anything, you can send a private letter to me

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response time: January 7, 2021. Please refer to the official website of Ping An Bank for the latest business changes
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5. The noise of computer comes from the following aspects: the noise of power fan, CPU fan, chassis fan and video card fan; The noise of hard disk and optical drive rotation; Resonant sound. The "buzzing" sound we hear when the computer is running is the superposition of these sounds. To effectively rece the computer noise, using a silent power supply or a silent CPU fan alone often can not achieve good results. We need to start from each noise source to solve the problem

1. Elimination of fan noise

power fan and CPU fan noise are the main noise sources. Power fan noise problem is relatively easy to solve, directly buy a silent power supply can be
the power fan noise rection method is generally to rece the speed of the fan, and if the CPU fan reces the speed, it will inevitably affect the heat dissipation of the CPU, so the CPU noise rection method mainly lies in the lubrication of the bearing and the structural design of the fan blade. Due to the high speed of the CPU fan, it is difficult for the noise value of the CPU fan to reach the level of the silent power supply, but we still try to choose the fan with the silent function. Of course, it is also a good way to add some lubricating oil to the fan bearing by yourself

the noise generated by the video card fan and the chassis fan is relatively small, but too many chassis fans installed in the chassis will also increase the computer noise. Installing fewer fans is an effective way to rece noise. However, for computers that have to install multiple chassis fans, you can choose some chassis fans with large diameter and low speed

2. Noise rection of hard disk or optical drive

e to the improvement of hard disk technology, the annoying "cluck" sound of hard disk reading and writing data has been basically inaudible, but the "buzz" sound of some hard disks is also considerable. At present, hard disk manufacturers have launched some silent concept hard disks, such as Seagate hard disk with "liquid bearing" technology and Samsung V series hard disk, which are good choices

the noise problem of CD-ROM drives is often difficult to solve. The noise of some CD-ROM drives has even reached an alarming level. In the words of some friends, reading CD-ROM is "like a helicopter". Some friends have installed software like DVD-ROM utilities, which can effectively rece the noise of the CD-ROM drive when using the CD-ROM drive, mainly when watching the DVD

3. Elimination of resonance noise

not every computer will proce resonance noise. In fact, the method to eliminate resonance noise is very simple. Just adjust the position of the chassis or add some soft cushions. It is not a good way to add sound-absorbing cotton inside the chassis, which often affects the heat dissipation of the chassis.

6. I believe many people who don't know much about BIOS don't know how to set it and what PWM means. And the options only let you enter a value, there is no unit<
the following is a detailed explanation
smart fan control (intelligent fan control will have auto automatic mode) (please use it carefully, I don't know why the fan hasn't turned on for a long time after I set it, maybe it hasn't reached the starting temperature of automatic mode) manual mode (to customize it, please choose this mode, It is recommended that people who have a certain knowledge of hardware should have the option of disabled off (the fan will use the maximum speed)
fan start PWM value
fan start temp ℃ (set the starting temperature of intelligent fan as temperature)
fan limit temp ℃ (set the temperature limit of intelligent fan as temperature) Temperature)
fan slope select PWM / ℃ (set the slope PWM option of intelligent fan to a numerical value)
everyone knows how to set the temperature, but some people don't know how to set the PWM. So we need to know what PWM is
PWM is actually a fan speed control method, that is, pulse width molation (PWM)
the following is a more professional explanation: (headache can be omitted...)
pulse width molation (PWM) is a method to set the switching frequency of the fan power supply to a fixed value and adjust the fan speed by changing its ty cycle. The higher the ty cycle, the faster the fan speed. The key of this control mode is to select the appropriate switching frequency. If the frequency is too low, the fan speed will oscillate with the PWM cycle. On the contrary, if the frequency is too high, the commutation rectifier circuit inside the fan will cut off the power supply of the fan acceleration / deceleration circuit and cause the fan to stop. The general frequency range is 20Hz ~ 160hz. In addition, the rise and fall time of PWM should be slow enough to ensure the long-term stability of the fan. The advantages of PWM control mode are simple driving circuit, good start-up characteristics and low heat dissipation of transistor. The disadvantage is that the stress of the fan is increased, and it is inconvenient to use the speed alarm sensor. The speed alarm sensor and the motor use the same power supply. If the motor power supply is connected or disconnected at the frequency of 20Hz ~ 160hz, the sensor will also be turned off or on, thus losing its detection function
in the PWM control method, the voltage of the fan is the rated value (such as the 12V power supply in the 12V fan) or zero voltage, but because the fan is not running at full load, its reverse electromotive force will be reced, which will cause the current ring the PWM conction period to be greater than the normal value. Although the fan is designed to handle large current, the current will increase 30 times per second ring the fan start-up phase, which will have a great impact on the reliability of the fan. However, PWM is still an ideal choice for low-cost applications
back to the point:
in the fan start PWM value option, the value you enter is the percentage of the number of revolutions the fan starts (this is a popular explanation, but it is not necessarily correct, But it's easy to understand)
for example, if the fan's maximum speed is 3000 rpm, you set it to 60, and when the fan start temperature ℃ you set reaches the temperature you set, it will run at about 1800 rpm (there will be a certain deviation, and the fan doesn't need to be particularly accurate)
how to set fan slope select PWM / ℃, In fact, this option is to set how much speed to increase for each degree increase (with the temperature of fan start temp ℃ as the starting temperature). When it is set to 1pwm, the fan will increase by 1% of the full speed. Take a 3000 rpm fan as an example, fan slope select PWM / ℃ is set to 3, and the fan is increased by 100 rpm for each degree of increase (there is a certain deviation in practice)

7. Personal opinion: I have encountered such a situation before. It seems that the problem is seasonal. In fact, I don't know what the reason is, but I think the reason for the loud noise of the fan is not from the fan, but from the vibration caused by the loose radiator. In the past, the method was very simple. After a while, it was not very loud! In addition, it may also be because your fan is aging, and there will be many programs transferred into memory when you start up. At this time, the fan speed will be very fast, because the shaft in the middle of the fan is worn, and the rotation deviates, and the noise will be proced when it rubs to the edge. But when you start up, the fan speed decreases, and the noise will also be reced! But when you run a large program, there will still be a lot of noise. Change a fan to completely solve the problem
!

8. If the noise is very loud, you can turn on the fan and add some oil, so that the noise will be reced

9. Under normal circumstances, the higher the speed of the cooling fan, the greater the noise

the reasons for the loud sound of the cooling fan are as follows:

1. The weather is overheated, and the internal temperature of the chassis is continuously high, so it is unable to heat in time, which leads to the continuous high-speed operation of the cooling fan and the loud noise

* * solution: the machine should be used in a relatively cool room or the indoor air conditioner should be turned on to control the room temperature, so as to prevent the influence of indoor temperature overheating on the computer. If you are using a laptop, it is recommended to purchase a cooling base and other auxiliary cooling

2. When the computer is used for a long time without cleaning and maintenance, a large amount of st is accumulated on the cooling fan, and the friction between the st and the shaft or between the shaft and the bearing causes the running noise to become larger

* * solution: the desktop computer can remove the side cover of the chassis, and use professional st cleaning equipment to remove the fan st; Notebook can use a soft brush and st blower to clean the cooling fan

tips: the above operation is relatively complicated. Non professionals suggest contacting engineers of Lenovo service outlets for operation, so as not to cause damage and affect the warranty

3. When running large-scale software or games, the CPU works at full load and the heat dissipation increases. Therefore, the cooling fan will run at full speed, resulting in a greater noise

* * solution: it is recommended to enter task manager and end the process with high CPU utilization rate; When running large programs, try not to run other programs, rece the workload of CPU, so as to rece the noise

example: (the method to find high CPU utilization is as follows, but the program is not limited to the following programs)

right click the blank space of the taskbar to call up "task manager"

in task manager, click the "CPU" column heading, and the task manager will sort by CPU utilization rate

select a higher program or process, right-click and select "end process" or click "end process" in the lower right corner

4. The abnormal wiring inside the chassis leads to friction between the cooling fan and the wiring, which increases the noise Tips: the content of this article is for your learning and reference. Lenovo does not recommend you to expand, upgrade or replace the hardware equipment on your own. This kind of operation is risky. If you have the above needs, we suggest you contact the nearest Lenovo service outlets for professional support

this kind of situation is mostly caused by the disassembly and assembly of non professional personnel. When Lenovo split desktop machine leaves the factory, the wiring harness has been tied and sorted with the cable management belt. After disassembly and assembly, please try to recover as much as possible to avoid abnormal noise

* to learn more about the operation skills of computer use and maintenance, click to enter the home page of "Lenovo business services" for more help.