CPU cooling technique and six misunderstandings

Truth and falsehood are often only separated, and many of the heat dissipation theories that we have previously served as truths actually have changed substantially over time, and individual or even "degenerate" has become a fallacy. If we do not update the concept in time, not only will be bound by these shackles DIY pace, but also to the computer cooling will bring some harm! So, today, let's go through them together!

One of the classic rumors: AMD has a large CPU, requiring a higher speed fan

Hazard Index: ★★★★

AMD processor's huge calorific value has been criticized by opponents, therefore, many even if the choice of AMD CPU users do not dare to take it lightly, preferring to endure the torture of high noise, but also for it with a high speed cooling fan.

In fact, from the K7 Thunderbird to now, AMD in the "Temperature control" to do the efforts are obvious, power consumption and calorific value has already fallen down. For Athlon xp,3000, the Super mute fan with no overclocking is enough. AMD has added a temperature monitoring circuit to the processor since Athlon XP, as long as the matching board with the corresponding circuit (many motherboard manufacturers call it "burning technology"), when the CPU temperature suddenly rise to a certain value, the system will immediately shut down or reboot, protect the CPU is not burned. Currently, almost all motherboards that support AMD CPUs are equipped with this circuit.

At the same time, high speed cooling fan high noise, wear large fan life to shorten, stop or fan motor burnout, such as the probability of failure is much larger than the fan of low speed, some inferior high speed cooling fan in the work will also produce vibration, directly endanger the CPU core "life"!

Conclusion: Current mainstream AMD CPU's calorific value is not bigger than Intel's P4, since we have the opportunity to enjoy the tranquility, why should give up?

Classic Gossip Two: the larger the fan power, the better the cooling effect

Hazard INDEX: ★

The main principle of air-cooled radiator is to absorb the heat generated by the CPU when the heat sink, rely on the radiator upper high-speed rotating fan to speed up the air flow, take away the heat of the heat sink.

Theoretically, the larger the fan power, the stronger the wind, the better the cooling effect. But the power only affects the cooling effect of a number of factors, a radiator heat dissipation effect, but also with its material, radiator design, buckle, grinding smooth degree is closely related, but not only by the power of the decision.

Therefore, the choice of what radiator will be based on your CPU calorific value to decide, can not be one-sided emphasis on high power, but with the computer itself to match the power, if the power is too large, not only can not play a good cooling effect, but may aggravate the workload of the computer, and ultimately shorten the CPU fan life.

Conclusion: When selecting CPU fan, we should choose the fan that matches the computer according to the principle of sufficiency. Similarly, the higher the fan speed, the better the cooling effect is not tenable.

Classic Gossip Three: memory needs to be attached to the heatsink

Hazard INDEX: ★

Memory generates heat in a way that is different from the CPU. Memory produces less heat than the CPU, and the heat will not be generated in an instant, so as long as the chassis heat well, there is no need for memory to paste the heatsink.

And the memory heatsink is often counterproductive. For example, the All-in-one memory heat sink, it is difficult to do with each of the memory particles are tightly combined, but let the heat accumulated in the heatsink and memory, blocking the heat dissipation. In addition, the removal of the memory heatsink has become a major problem. Many inferior heat sinks are almost no longer removed from memory after they are installed. When installed, if you accidentally touch the memory chip around the integrated circuit, but also can cause unpredictable consequences.

There are also some manufacturers to reduce the heat sink and the gap between the memory, the use of thick thermal conductive adhesive as filler. Heat conductive adhesive thermal conductivity is good, if you do not have the thermal conductivity or poor thermal conductivity, the use of this heat sink for the memory covered with a "quilt", the effect can be imagined.

Conclusion: The general use of -mediated ⒉  诖 Yan  Fairy ⑷ around ?lt;/strong>

Classic Gossip Four: the color of silicone grease is better than the white

Hazard Index: ★★★

The reason to apply silicone grease is because the surface of the CPU (or chip) and heatsink is not completely smooth, but uneven. It is these uneven air gap caused by the CPU can not be very good to transfer heat quickly to the radiator. Thermally conductive silicone grease can fill the visible bumps of the naked eye, thus increasing the efficiency of heat conduction. The market of silicone light from the color up, you can see white, silver gray, black, gold and so on. JS will say that the color of silicone grease is doped with metal powder, heat conduction effect than the traditional white good. Is that so?

Two kinds of white heat-conductive silicone grease

In fact, white silicone grease is the most common, and silver-gray is generally called "Silver Silicone Grease", containing the most of the AG silicone grease is a good thermal conductivity of silver compounds or powder. Usually silver is only a small proportion, not because its color is black, it is mistaken for its silver content is very high. There is also a silicone fat and silver silicone fat is the same color, but the addition of graphite powder. The advantage is that in the premise of keeping good heat dissipation, it can effectively reduce the cost, so it is only a little more expensive than ordinary silicone grease. But the "gold-bearing silicone Grease" is only a small number of gold-plated powder, the so-called gold-bearing is only a business camouflage. Its heat conduction effect even does not have the ordinary white silicone grease good!

It is noteworthy that the author recently found that there are JS used in industrial heat insulation silicone grease when the thermal grease to sell, we do not buy, and the use of thermal grease, in contrast, use it will prevent heat conduction, the equivalent of the CPU "insulation."

Conclusion: There is no direct relationship between the difference of silicone fat color and thermal conductivity. The best to buy the products of the manufacturers, the quality is more assured.

Classic Gossip Five: Install a hard drive fan to help extend hard drive life

Hazard Index: ★★★★

A lot of friends think hard disk heat is very big, summer time especially worry, so some people installed the hard disk cooling fan. The intention is to reduce the working temperature of the hard disk and prolong its life. But in most cases, this often backfired, and the hard drive fan became the killer of the hard drive! Now, most of the hard drive fans are fixed directly on the hard drive with four screws, with a single fan or a double fan to the hard drive cooling. The thermal effect of this hard disk fan is good, but since the fan is directly fixed on the hard drive, the vibration of the fan will be directly transferred to the hard disk, the quality of the hard drive fan problem is not big, but the market is more of a bad hard drive fan, with the poor quality of the oil fan, with a long time will be due to poor lubrication and vibration. And the hard drive is the most afraid of vibration, light affects data security, the entire hard drive reimbursement. Therefore, you are not recommended to use the hard drive fan.

Conclusion: Under normal circumstances, the hard drive is not required to take active heat dissipation, if the use of the environment is really bad, you can find a CPU with the cooling fan, with a rubber band hanging on the hard drive, and hard drive to maintain a certain distance, so that the vibration generated by the fan can be absorbed by the rubber band, the cooling effect is also good. At the same time, the hard drive and other accessories such as floppy drive too close, to maintain a distance to the heat is also beneficial.

Classic Gossip VI: Cooling software can significantly reduce CPU temperature

Hazard INDEX: ★

There are a number of ways to reduce the CPU temperature, but essentially there are two broad categories--strengthening heat dissipation and reducing heat. and cooling software belongs to the latter. Does cooling software really work? The player coming from Win95 may give you a very positive answer: "I thought I was using rain to keep my old Ben down 5℃!" that year (56 ago). "It was indeed true at the time!" But it has become a history.

Most of the cooling software is the use of HLT instructions to allow the CPU in the idle time to enter the "sleep" state, to reduce the calorific value of the CPU. But with ACPI-enabled operating systems such as Win98, Win2000, and WinXP, cooling software is no longer important, especially as Win2000 and WinXP themselves have the ability to cool software-allowing the CPU to suspend when it is idle. So it's no help to cool down by using this kind of software now.

But then again, for AMD users, there is indeed a software cooling method, many new AMD motherboard or old motherboard upgrade BIOS will add a "CPU Disconnect" or "s2k c1/c2 Disconnect" option, and has been shown in the CPU Idle conditions allow the AMD CPU to reduce the number of degrees Celsius.

Conclusion: The cooling software has lost its former efficacy, and only some specific users can benefit from it at present.