Asus Maximus IV GENE-Z - Manual (Page 48)

2.2.5 Expansion slots
Ensure to unplug the power cord before adding or removing expansion cards.
Failure to do so may cause you physical injury and damage motherboard
components.
Slot No. Slot Description
1 PCIe 2.0 x16/8_1 slot
2 PCIe 2.0 x8_2 slot
3 PCIe 2.0 x4_1 slot
• In single VGA card mode, use the PCIE_X16/X8_1 slot for a PCI Express
x16 graphics card to get better performance.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2/3
when using multiple graphics cards for better thermal environment.
2-16 Chapter 2: Hardware information