Measuring in at 305 x 244 mm (12 x 9.6 inches), this size of motherboard has plenty of room for four or more RAM slots, multiple PCIe cards at several lengths, and two to four M.2 slots.

BrandMSI MaterialSteel, Mesh, Plastic Motherboard Size (Max.)EATX (Up to 305 x 280 mm) Graphics Card Size (Max.)360 mm 3.5" Drive Slots2 RGB LightingARGB ...