A:Answer Motherboard is a Prime B450M-A (microATX) (9.6 in x 9.5 in in the documentation). For the PCI-e slot, short answer is no, there is not. Long answer is more complicated. There are 3 PCI-e slots total: One PCI-e x16, and two PCI-e x1. The graphics card uses the x16, but ends up covering a spare x1 slot. The last x1 slot is used by the network adapter.