The shape of the heat sink is also related to the heat dissipation effect. Ordinary heat sinks are die-cast, and the common shape is just a "leek" shape with a few more pages. The heat dissipation effect of this kind of heat sink is the most common. The high-grade heat sink is turned by lathe with aluminum mold, and the shape after turning is a plurality of columnar protrusions. This kind of heat sink is often used in high-end graphics cards and CPU of some foreign prototypes. There is also a fin-shaped heat sink, which is bent from a thin aluminum plate and looks like the bellows of an accordion. This fin radiator has a good heat dissipation effect. More upscale is the vortex guide fin, which is die-cast, intensive in heat dissipation, and inclined in a certain direction to facilitate air flow. This kind of fin is used in the famous "turbofan" and the original CPU cooling fan. No matter what shape, as long as the contact surface area between the heat sink and the air is large, the heat dissipation effect will be better. At the same time, the shape that is easy for air flow and heat dissipation is the most suitable.
2. Heat capacity
Few people pay attention to this problem, but it is really influential. Thermal capacity is like a cache of hard disk, which plays a role in stable and efficient heat transfer and storage. A good radiator should have a certain heat capacity. The large radiator has high heat capacity, and the copper material is more prominent.
3. Double fans
It is safer to use two fans than a single fan. If one fan is broken, the other fan can work and bring more air, but unfortunately, it also brings a lot of noise. In addition to the noise of two fans, there will be a lot of air whistling. If you have a headache about noise, it is recommended not to use double fans.
4. Exhaust air volume of cooling fan
The exhaust air volume is the best factor to measure the performance of the fan. If a fan can reach 5000 revolutions, but its blades are flat, there will be no airflow, so the angle of the blades is the decisive factor.
5. Fan power supply
At present, the power supply of fans generally adopts the power socket provided by the motherboard. The representation of three lines has the function of measuring rotational speed, and some motherboards also support temperature control. If the CPU temperature is too high, it will automatically speed up the fan operation, but at the same time, if there is a standby mode, it may stop the fan operation, which is very dangerous and easy to burn the CPU.
6. Strength
Power is the primary condition of a cooling fan, and the power of this fan will not directly affect the cooling effect. Our usual fans are DC 12V, and the power is from 0. X watts to 2. X watts. The power needs to be selected according to the calorific value of your CPU. Theoretically, it is better to choose a slightly higher power, because this fan has a higher speed, such as 1.4- 1.8 watt cooling fan. However, it should be noted that we should not blindly pursue high power. Excessive power will increase the load of the host power supply.
7. Noise:
Because the power and speed of fans are getting bigger and bigger, there is a negative effect, that is noise. Most friends who use computers are engaged in mental work, and noise is undoubtedly the primary enemy. If your work is often accompanied by the roar of the fan, it is no less than a nightmare.
Introduction of mainstream fans (1)
Antarctic wind YOU-C-004B fan supports 1.5GHz Thunderbird processor. The cooling fin part (including blades) and the bottom plate of the fan are made of copper. The bottom plate is about 5mm thick and looks very smooth after polishing. The weight of the whole fan is about 385 grams, which exceeds the carrying capacity of two CPU cores. Some friends may think that it must not be used outside the bearing range of the die surface, so as not to crush the CPU die. But in practice, we need to be clear that when the fan contacts the CPU, not only the core part is stressed, but also the periphery of the CPU is under certain pressure, so don't worry about it. As long as you are careful when installing, the core will not be crushed under normal circumstances. This YOU-C-004B is also equipped with a large fan with a volume of 60mmX60mmX20mm, which is basically equal to the size of a heat sink and weighs about 55 grams, accounting for 17% of the total weight. It has as many as 32 cooling blades, each blade is about 20mmX60mm in size, which can provide a contact area of about 768 square centimeters. Although this increases a lot of heat dissipation area, at the same time, because the blades are too thin and dense, there will be greater resistance when the wind presses down, and the air swing space will become much smaller, which is not conducive to the rapid transfer of heat. There is a little silicone grease in the package when this fan is sold, which is not much, but it is enough.
Foxconn, the world's largest manufacturer of CPU radiator, has been favored by DIY friends for its excellent performance and excellent quality. From PK888 and PK889 in those years to PK085 now, it has always been the object sought after by enthusiasts; Now they have launched a new generation of products-PK 045. This fan adopts a very traditional design, and the surface of the heat sink made by aluminum extrusion process is a little gray, which is not the true color of aluminum. Everyone knows at a glance that it must be surface treated. It still feels heavy in your hand, about 235 grams. This weight is largely attributed to a nickel-plated copper plate welded at the bottom, and copper, a metal with thermal conductivity second only to silver, undoubtedly contributes to the heat dissipation of CPU as soon as possible. At the same time, because it is welded, it has better thermal conductivity than the previous heat dissipation bonding process, and the nickel-plated copper plate is easier to protect copper from oxidation. This fan is also very distinctive. The 60*60* 15mm ball fan with large air volume reaches 17CFM, but the speed is only about 4000 rpm. On the one hand, it can ensure timely heat dissipation, on the other hand, it will not bring annoying noise from high-speed fans, which is very considerate for those consumers who like quiet.
Foxconn PK 0 16 cooling fan has a heat sink size of 60.0X5 1.5X42.0, while the fan size is 50X50X 15. The rated voltage and current of the fan are 12V, and the fan speed is 64000. PK 0 16 improves the noise problem of PK 889. Instead of fixing the fan directly on the radiator, four damping clips are added between the fan and the radiator to reduce the noise, which reduces the noise to some extent. And the fasteners have also been improved. Compared with PK 889, the fastener of PK 0 16 has larger bending radian and stronger fastener strength, which makes the radiator contact with CPU more closely and looks difficult to disassemble. However, Foxconn has taken this problem into consideration in its design, so the PK 0 16 chuck is enlarged and can be easily disassembled without external tools. Unlike some cooling fans, it is difficult to disassemble after installation, and it is easy to damage the CPU if you are not careful.
It is worth mentioning that Foxconn is not only recognized by the market in manufacturing CPU fans, but also outstanding in other computer accessories. For example, the socket on the motherboard, the socket on the CPU, and the socket on the periphery of the chassis have a high market share. It fully shows the strong technology and manufacturing ability of this manufacturer.
Introduction of Mainstream Fans (2)
Since the appearance of turbofan, it has triggered a big cooling fan war in the market, and now Tt has launched a dual-fan turbofan. This fan uses a hexagonal box with specifications printed on the outside, and it is specially marked: forsocket 462 upto 1.5Ghz, which seems to be specially made for AMD Thunderbird. The maximum support is Thunderbird 1.5g, with exquisite workmanship and smooth radiator surface. The blades of the cooling fan of the fan are machetes, with deep blades and large inclination. Adopt advanced vortex guide fins. These fins are formed by die casting and are all inclined in one direction. When the fan runs at high speed, it can generate greater driving force, accelerate air flow and increase air flow per unit time. Moreover, the nominal maximum air volume of the fan is 25.45 cubic feet per minute, which is 65 cubic feet per minute higher than that of ordinary fans. The fan also uses two motors and two sets of cooling fans, which are arranged coaxially. Of course, this also takes up two fan sockets on the motherboard. Because two fans are used, the power consumption is relatively large, and the rated power is 3. 12W (12DC X 0.26A), which is much higher than that of ordinary fans.
JAKS52A, a quick-frozen king fan, comes from a manufacturer-Jieyi. This fan is petite and not big, and it is not inconvenient to install. It can also be installed smoothly for some motherboards with small space around CPU sockets. JAKS52A are all made of aluminum, and the heat sink is relatively thin, which can effectively and quickly transfer heat and will not accumulate at the bottom of the radiator. Thickening the bottom can at least transfer the temperature at the top of most CPU. Of course, this requires the cooperation of fans and fins. Otherwise, it can only be counterproductive. For JAKS52A, the radiator is relatively large and the buckle is relatively elastic, so it is made into double rows to enhance stability and avoid excessive fan shaking. JAKS52A' s belt buckle is more distinctive, with a joint and other small things added to it. Fan is a popular ball bearing fan. Compared with other fans, the fan has more blades, so even when the speed of the fan is relatively low, it will achieve better results because of the increase of blades. The speed of these two fans is 5000 rpm and 4500 rpm respectively. If you want to achieve good results at a lower speed, you have to rely on the design of radiator and fan blades. If the fan speed can be effectively controlled without affecting the heat dissipation effect, the noise will naturally be reduced.
Since 7-up Computer Company launched Buffalo's "Two-pole Wind" CPU cooling fan, the market response has been strong, and all parties have received rave reviews. It has the following characteristics:
1. The patented I-shaped radiator design not only increases the contact area between the radiator and the air, but also absorbs heat evenly to the radiator at the fastest speed. 2. Embedding four groups of high-density N-type fins. Because the fins are extremely thin (less than 0.2 mm in thickness), the heat dissipation surface area is more than twice that of conventional fans, which is beneficial to quickly absorb and discharge heat.
3. Two ball fans with the rotating speed as high as 5400RPM work at the same time, forming two powerful airflow to take away heat.
4. Special circlip design, suitable for the latest CPU of Intel and AMD.
Because this CPU fan is particularly compatible and can be applied to different CPUs, it has always been favored by users. Coupled with the unconventional cooling surface design, the cooling effect has been pushed to a new height. In other words, it can be recognized by consumers in the market and praised by professionals at the same time. I believe that this buffalo's "two-pole wind" can occupy a place in the highly competitive fan market.
Shuyu
The CPU fans we introduced above are all mainstream products on the market now. Among the CPU fans we introduced, Foxconn has a high reputation among consumers, and the quality of CPU fans from other manufacturers is also improving rapidly. If in this hot summer, the purchased fan does not have a good cooling effect on the CPU, and frequently crashes and restarts, the consequences can be imagined. Not only damage the computer, but also lose money. That's really a thankless thing for both sides. We think this is definitely not the result that consumers want to see!