That is an ATX motherboard and per the General Data area here: http://www.bequiet.com/en/case/546 the case will take ATX, Micro-ATX, Mini-ITX so yes that motherboard will fit.
That is an ATX motherboard and per the General Data area here: http://www.bequiet.com/en/case/546 the case will take ATX, Micro-ATX, Mini-ITX so yes that motherboard will fit.