Capacitors in the main board is mainly used to ensure the stability of voltage and current (filter). Now personal computer is more and more fast, with the improvement of CPU frequency and working frequency of the system bus, also more and more strict with the motherboard power supply, so the mainboard stable work is the premise of must have a pure current supply. If that came out of the on current oscillographic instrument observation will find that there are a lot of the peak and clutter, the rush and clutter are enemy of mainboard stable jobs, so the motherboard must be used for power filtering and purifying ability for different clutter with different components for filtration and purification. The main components are choke coil and capacitance. Original electric current flows through the choke coil (commonly known as the coil) first, because the coil is characteristic of an energy storage, it can be a preliminary filter out some of the high frequency noise, and then enter the capacitance group further filtration, purification, flattening (the peak shape wave into a square wave).

Motherboard common capacitance tantalum capacitor and aluminum capacitor (electrolytic capacitor). Aluminum capacitor capacity is larger, the price is low, but easily affected by the temperature, the accuracy is not high; And over time will gradually failure. Tantalum capacitor long life, high temperature resistant, high accuracy, but smaller capacity, the price is high. Unless a large capacity filter is required places (such as near the CPU slot), in principle, the best use of tantalum capacitor, because it is not easy to cause the waveform distortion.

See capacitance capacity: according to the Intel motherboard technical white paper, now near the motherboard CPU socket filter capacitance single lowest capacity is 1000 u F, mainboard is generally adopts 1000 mu F electrolytic capacitor (very calculative), at the socket on the motherboard of the Intel, the capacitance of a single capacity up to 3300 mu F, this is everybody admired one of the reasons Intel motherboard stability.

At present some motherboard like to use a small amount of a few large capacitor to replace a bunch of small capacitance, such look from the material cost is increased, but from the point of view of the production cost is reduced, because the capacitance is manual installation, spare parts for the less installation steps and the less artificial cost, the lower the maintenance is relatively convenient, also can reduce production cost. This is where a digression, no longer say more. In a word, must have a performance outstanding mainboard high-quality capacitor.

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