Asus P8Z68-V Pro (Refurbished) Motherboard Schematic Asus P8Z68-V Pro (Refurbished) Schematic × Asus P8Z68-V Pro (Refurbished) Pictures × Previous Next Model: Asus P8Z68-V PROInstalling any PCI-E device in the secondary PCI-E x16 slot automatically sets both the primary and secondary PCI-E slots to x8 speeds.