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A micro atx case, called the Advanced Technology Extended computer case, of which the design is to allow the use of any motherboard and power supply with the assurance that it could fit in the case. The cases also come with removable plates in the rear to enable the keyboard and speaker ports to fit easily. A micro-ATX case has smaller footprint and much fewer expansion slots than a regular ATX case, thus it requires special micro-ATX motherboard. However, a micro-ATX motherboard will fit inside a regular ATX case. Not all those motherboards have the same physical sizes. Some cases use normal ATX or mini-ATX power supplies while some use microATX ones.  MicroATX was explicitly designed to be backward-compatible with ATX. The mounting points of the motherboards are a subset of those used on full-size ATX boards, and the I/O panel is identical. Thus, they can be used in full-size ATX cases. Furthermore, most motherboards generally use the same power connectors as ATX motherboards, thus enabling the use of full-size ATX power supplies with the boards. Many modern ATX motherboards have five or more PCI or PCI-Express expansion slots, while microATX boards have only four under normal conditions. In order to conserve expansion slots and case space, many manufacturers produce the motherboard with a full range of integrated peripherals, which may serve as the basis for small form factor and media center PCs. A mini itx case is a low-power motherboard form factor developed by VIA Technologies in 2001. They are commonly used in small form factor computer systems. This kind of boards can often be passively cooled due to their low power consumption architecture, which makes them useful for home theater PC systems, where fan noise can detract from the cinema experience. Mini-ITX does not define a standard for the power supply, though it makes some suggestions of possible options. Accordingly, the Mini-ITX boards use an "original ATX" power connector, which is usually connected to a DC-DC converter board and in turn it is connected to an external power adapter. Generally, both the power adapter and the DC-DC board are supplied with the case. Some boards that have built in DC-DC converters and converters have also been made to plug directly into the ATX connector, either of these options avoids the need to mount a separate DC-DC converter into the case, saving space and design effort. Boards using full-power Intel or AMD CPUs typically use ATX12V 2.x connections and require a case with appropriate power supply and cooling for these more power-hungry chips. This article comes from:http://en.goldenfield.com.cn/news/71.htm
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micro atx case, mini itx case,
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