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Service > Heat conduction medium

Heat conduction medium

Air cooling is not the best way to solve the problem of CPU cooling, but the development of the current PC machine is concerned, in addition to this, it is not without it. But in the use of fans on the CPU cooling method, the majority of people still have a little misunderstanding, they believe that as long as the power of the cooling fan. Fast enough, heat dissipation is good enough to solve the problem of CPU heat dissipation. In fact, this concept is not comprehensive, they ignore the two important details of the fan cooling, the first is whether the air flow passage is open, and the other is the heat sink and CPU contact surface heat conduction effect is good. And today I in here is to everybody introduce how to use thermal grease, silicone the two most common heat conducting medium, let the CPU and the heat radiating sheet contact surface reaches the optimum heat conducting effect.
Thermal grease
Due to production again excellent the CPU heat sink and the contact are inevitably appear gap, so the main role of the thermal grease is filling CPU and heat sink between voids, increase their contact surface to improve the thermal effect. But want to notice, because the metal radiating fins of the heat capacity is much stronger than the thermal grease, so here the use of thermal grease is only used to fill the gap, and not used for connecting the CPU and heat sink, must not think thermal grease is the main heat, in fact, it is only to help heat sink. Now sold on the market of DIY special thermal grease mainly has three kinds: white thermal grease, grey thermal grease and a rare partial black thermal grease. The white thermal grease: the most common thermal grease. Room temperature is viscous liquid state, because in the grease adding different content of metal powder and divided into several grades. The difference is their sticky to varying degrees, which the better of silver component is more heat dissipation effect, of course, its price higher.
Grey thermal grease: the thermal grease is Intel original thermal grease, it in the thermal grease added of graphite powder to enhance the effect of the thermal conductivity, if you think this grease graphite is not enough, you can also add your own some. The grey on the glass plate thermal grease, and then put the pencil on the ground, while grinding and mixing grease. But a little attention to, in the grinding process not too hard, otherwise the pencil core particles is too large, but the impact on the effect of heat conduction. Partial black thermal grease: the "color" thermal grease did not what secret, only in the thermal grease added a small amount of solder powder, is said to the cooling effect in the thermal grease is the best.
The use of thermal grease, do not have any concerns (some friends fear sticky grease after the CPU will not rub off), in fact, most of the thermal grease not too strong viscous, sticky after the CPU can be easily erased. As for how to pay attention to apply thermal grease is. Apply grease to notice dosage, the daub amount can not be too much, just to the protruding part of the CPU core and other parts of the fill or the groove painted on it, avoid by all means will get it on the CPU is everywhere. At the same time, when the smear must be uniform thickness. Grease in special attention to not have bubble, otherwise the gap in the air will play the role of insulation. Another point to emphasize is that due to AMD CPU surface has many bare copper wire, in the use of thermal grease, we must figure out whether it contains an excess of graphite powder and metal powder in the grease, so as to avoid the terrible consequences of short circuit.
Heat conduction silica gel
Silicone thermal effects and thermal grease is basically the same, there are so many it, color is not the same, but one thing in common: low temperature was solidified shape, high temperature is a viscous liquid and thermal conductivity. It is worth the attention of the majority of friends, here said that the thermal conductivity of silica gel is not industrial silica gel. Industrial silica gel is characterized by a high temperature resistant and high temperature (cover can also be), if you buy the industrial silica gel... Apply thermal conductivity of silica gel method and coated with thermal grease is similar, but due to the thermal conductivity of silica gel in the first use of time will be CPU high temperature melting, and then evenly bonded on the cpd and the heat sink, when the cooling temperature decreased, silica gel is the CPU and heat sink tightly connection together; so when applied to absolute attention not smear too much, otherwise high temperature melt silicone will flow to the CPU slot above, not only will the CPU firmly stick in the CPU socket, and there may be the CPU pins insulated, resulting in CPU can not work normally.
Thermal grease, silicone the CPU and heatsink bonding together more easily, and to separate them is not so easy, so this article will finally describes how to remove the sticky with grease and silicone CPU. Remove sticky CPU thermal grease is relatively simple, after all, it's the degree of adhesion is not strong, with a sharp knife from the cpd and the fin gap insertion (in order to prevent damage to the prominent among the CPU kernel, the best from the kernel beside insertion), then gently pry can solve problems; and removing stuck with the CPU of the thermal conductivity of silica gel is not so agile, usually can only use the most rude method, with a knife incision. Due to CPU of ceramic is very strong, so as long as you are careful boldness is fully able to do, which is now no longer the all-purpose adhesive for thermal silica (all-purpose adhesive too firmly that it is almost impossible to separate the CPU and heat sink).

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