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Micro ATX is one of the offshoots of ATX. The main difference from the main ATX form factor is size. ATX is a rectangular board size that measures 305mm. by 244mm. Micro ATX is a square that retains the 244mm. width but cuts down the length to by 61mm.

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9y ago
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8y ago

A mATX is smaller in size in compared to a ATX board, and therefore has lesser of certain slots (e.g. PCI Express and RAM slots). Otherwise, they're pretty much the same.

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Q: What is the main difference between ATX and Micro-ATX?
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ATX, MicroATX, Flex ATX, BTX, and NLX, In that order.


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What is the main difference between AT and ATX style motherboard?

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