Micro ATX in a ATX/mATX case

Dec 21, 2013
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I was wondering...If I chose a case that is both ATX and mATX compatible and if I chose the mATX would I have more room from the top of my case to the MoBo it self? With a ATX board in my case I can't fit a 240mm watercool on the top. With a mATX MoBo would that change?