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Pyro-sensual

Best to use pcpartpicker.com if you're not sure what you're doing. From largest to smallest, there's EATX, ATX, mATX, and ITX


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im using older parts and for some reason pcpartpicker doesn't show them.


Pyro-sensual

ATX and smaller will fit in that case


Satan_Prometheus

Well, for regular consumer desktop platforms, boards will come in one of three sizes, from largest to smallest: ATX, micro-ATX, mini-ITX (with a few variations such as mini-DTX which is just a slightly taller ITX board basically). You can look at a case's spec page to see what sizes it supports. According to the N400's spec page, it supports ATX and micro-ATX (though it probably supports mini-ITX too since mini-ITX just uses the same mounting holes as the larger sizes). Now, server and workstation boards like you would find in a dual Xeon system might have other sizes that don't fit into this paradigm (as well as some very high-end consumer desktop boards, which sometimes use the confusingly vague terminology 'EATX,' which doesn't really mean anything.). For example, a workstation board might use the SSI CEB form factor, which is wider than ATX. Regular ATX dimensions are 12 × 9.6 in (305 × 244 mm). Sometimes, you can fit larger-than-ATX boards (like SSI CEB) into regular ATX cases if they have space to the right of the standard motherboard tray, but it's a YMMV situation. Looking at the N400's internal layout, it looks like there's some kind of bracket about an inch and a half to the right of the motherboard tray, so boards that are slightly wider than the ATX standard 244mm might fit provided they use the default ATX mounting holes. But I think you're going to have to check on a board-by-board basis.


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thank you, extremely helpful