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In computer design, microATX (sometimes referred to as mATX or µATX) is a standard motherboard form factor introduced in December 1997. The maximum size of a microATX motherboard is 9.6 xx 9.6 in. However, there are examples of motherboards using microATX designation despite having a smaller size of 244 xx 205 mm. The standard ATX size is 25% longer, at 12 xx 9.6 in.

Backward compatibility

microATX was explicitly designed to

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