4 pci slots, 5 pci express x1 slots, 6 pci express 2.0 x16 slots – Asus P5Q-E/WiFi-AP User Manual
Page 42: 7 universal pci express x16 slot (black), Pci slots -16, Pci express x1 slots -16, Pci express 2.0 x16 slots -16, Universal pci express x16 slot -16, 7 universal pci express x16 slot
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