Can an ATX motherboard go inside a micro ATX case? Tags: Homebuilt Cases ATX Motherboards Systems Last response: August 18, 2009 5:24 PM in Systems Share hobbes203 August 18, 2009 6:08:49 AM The question is the title. The ATX motherboard size is 12" x 9.6" and the micro ATX case is 16.6" x 10.9" x 14.5". So I would think it could fit. Would the expansion slots line up or something? More about : atx motherboard inside micro atx case hunter315 a b B Homebuilt system a b V Motherboard August 18, 2009 6:10:31 AM No, it wont have the right mounting holes for the motherboard standoffs. You can put a microATX board in an ATX case but not vice versa. jbakerlent a b B Homebuilt system a b V Motherboard August 18, 2009 6:10:54 AM No, but the opposite is possible... Edit: @ hunter: ditto what you said on the other post Can't find your answer ? Ask ! Get the answer huron a b V Motherboard August 18, 2009 5:24:46 PM Nope...ATX are full size boards. You can't fit them into a smaller space, but can fit smaller boards (micro-ATX) into a bigger space - just like Hunter said Can't find your answer ? Ask ! Publish Read discussions in other Systems categories Homebuilt New Build Prebuilt Cases Power Supplies RAM CyberPower !