How to install the front and rear fans of mining machine
1 Place it in the yellow circle below. The fan is installed on the inside of the chassis, and the fan trademark faces inside the chassis. The cable of the fan is plugged into the pin of "system fan" on the motherboard, and the three pin and four pin share the same interface. Pay attention to align the snap< br />
then the fan at the back of the chassis is installed with suction, that is, to blow out
in this way, a channel can be formed to quickly exhaust the hot air in the chassis.
Installation requires a screwdriver. There are the following two steps:
1. A fan has four corners, and it is also the four corners for fixing the fan, which are generally fixed with screws
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after the external force stops, there is still a strong current, at this time, the heat is huge, and it is easy to burn the motor; The fan with self starting function, e to its special IC design, has zero current after stopping and can rotate again after removing the external force
In addition, at the same speed, the working current of the fan with self starting function is only half of that of the ordinary fan, and the power consumption is very low. These two special functions of preventing the proct from overheating greatly extend the service life of the fan and improve the cost performance of the proctfor chassis heat dissipation: hot air can be discharged along the back panel of the chassis to make cold air flow into the chassis from the lower part of the front panel. So that the formation of a continuous convection environment, rece the ambient temperature in the chassis, so as to effectively achieve auxiliary CPU, graphics card and other heating elements of heat dissipation
when used for power cooling: in addition to taking away the heat of the components in the power supply, it can also assist in discharging the hot air flow in the chassis
if it's me, it's better to open some ventilation holes on the front panel or the side panel near the hard disk, and then install an air extraction fan on the back of the chassis. Because even if a fan is installed near the hard disk, it blows hot air, and after opening and installing a ventilator, it blows cool air, and at the same time, it also cools the chassis as a whole
in addition, you can consider changing the chassis (hehe, the cost is higher). It is recommended that rc-k100, the supreme destroyer of cool cool, has thick plate (6.3kg empty box), metal mesh panel, anti radiation, st-proof, good heat dissipation effect, with original front air inlet fan (cooling the hard disk directly), and the panel has eSATA interface, the price is slightly higher - the price is 299 yuan, The actual price is about 250 yuan.
payment license payment companies mainly include: Alipay, fast money, money paid, remittance world, first letter Yi, ring Xun, double dry payment, Bao Fu, Yi Bao and so on.
2. Generally, there are two places to install fans in the chassis. The front one is usually in the hard disk bracket, and the back one is usually under the power supply and above the keyboard port. The chassis with higher price has been installed with 1-2 fans. When installing the chassis fan, the principle of air flow should be followed. If the installed fan goes forward and then out, the air path inside the chassis is very regular from front to back; If the fan is installed upside down, back in front out or back in front out, because the power fan is also out of the air, it will cause confusion in the air path. When only one chassis fan is installed, it depends on whether it is cooling the hard disk or the whole machine, depending on your cooling needs. Many chassis factory fans are installed in the rear fan position by default, and are suction, which is really reasonable.
It's fake
In 2008, CCG group and Guangdong Coin Collection Association signed a cooperation agreement in Hong Kong to jointly set up coin identification and rating agencies. This is China's first coin appraisal and rating agency, which means that there will be international standards for the quality of Chinese coinsin 2015, as a national legal tender proction enterprise under the people's Bank of China, China Banknote Printing and mint Corporation started to prepare for the identification business of Chinese banknote. Its purpose is to establish an authoritative, fair and professional third-party banknote identification and rating agency to fill the gap of the lack of official banknote evaluation agency in China
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coin rating is the judgment of coin appearance, which refers to the quality of coin physical state and the perfection of coin surface. With the continuous improvement of coin collecting level in various countries and the deepening of international coin exchange, the majority of coin lovers are more and more concerned about the appearance of coins. Coins with good appearance are pleasing to the eye, while coins with serious wear and scars can not give people aesthetic feeling
collectors in China have no strict criteria for judging the appearance of coins, and lovers often use vague descriptions such as "complete proct" and "top proct" to define the appearance of coins, which is neither scientific nor unified
Although there is no internationally recognized standard for classification, the International Coin instry has been trying to formulate a standard suitable for most countries, and generally formed two evaluation methods, namely descriptive classification method and digital classification method