Dell Dimension E521 Motherboard Type?

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May 16, 2017
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I Have A Dell Dimension E521 And I Have No Idea What Motherboard Type It Is Can Anyone Help Me Please I Don't Know If It's ATX Or BTX Or If It's OEM Specific To The Case.
 
Solution
Its a btx standard, whenever case panels are on the left side of the case, that will always indicate a btx mobo.
DIMENSION-E521-2B-3.jpg