8 expansion slots, 1 installing an expansion card, 2 configuring an expansion card – Asus M5A78L-M/USB3 User Manual

Page 28: 3 pci slots, 4 pci express x1 slot, 5 pci express x16 slot, Expansion slots -18 1.8.1, Installing an expansion card -18, Configuring an expansion card -18, Pci slots -18