Asus Crosshair V Formula/ThunderBolt - Manual (Page 44)

• In single VGA card mode, use first the PCIe 2.0 x16_1 slot or PCIe 2.0 x16/
x8_3 slot for a PCI Express x16 graphics card to get better performance.
• In CrossFireX™ or SLI™ mode, use the PCIe 2.0 x16_1 and PCIe 2.0 x16/
x8_3 slots for PCI Express x16 graphics cards to get better performance.
• Use the PCIe x16_1, PCIe x8/x1_2, and PCIe x16/x8_3 slots for 3-Way SLI
or CrossFireX™ mode.
• If you install a PCIe x16 graphics card on to the PCIe x16_1 slot, a PCIe
device with a bandwidth faster than x8 link to the PCIe x16/x8_3 slot, and a
PCIe device with a bandwidth slower than x4 link to the PCIe x8/x1_2 slot,
the three PCIe x16 slots will work at x16, x16, x1 link as the default.
• If you install a PCIe x16 graphics card on to the PCIe x16_1 slot, a PCIe
device with a bandwidth slower than x8 link to the PCIe x16/x8_3 slot, and
a PCIe device with a bandwidth faster than x4 link to the PCIe x8/x1_2 slot,
the three PCIe x16 slots will work at x16, x8, x8 link as the default.
• We recommend that you provide sufficient power when running
CrossFireX™ or SLI™ mode.
• Connect a chassis fan to the motherboard connector labeled
CHA_FAN1/2/3 when using multiple graphics cards for better thermal
environment.
IRQ.assignments.for.this.motherboard
A B C D E F G H
Intel 82583V – – – – – shared –
ASM1061 – – – – shared – – –
ASM1042 USB3.0_1 – – – shared – – – –
ASM1042 USB3.0_2 – – shared – – – – –
ASM1042 USB3.0_3 shared – – – – – – –
Onchip SATA Controller – – – shared – – – –
Onchip USB_1 – – shared – – – – –
Onchip USB_2 – – shared – – – – –
Onchip Azaliz shared – – – – – – –
PCI Slot – – – – shared – – –
PCIE_X16_1 shared – – – – – – –
PCIE_X8/X1_2 – – – – shared – – –
PCIE_X16/X8_3 shared – – – – – –
PCIE_X4_4 shared – – – – – – –
PCIE_X1_1 – – – – – – – shared
2-14 Chapter 2: Hardware information