Asus A88X-PLUS/USB 3.1 A88X-PLUS/USB 3.1 Users manual English - Page 14

• In single VGA card mode, use the PCIe 3.0 x16_1 slot (gray) for a PCI Express x16 graphics card to get better performance. • We recommend that you provide sufficient power when running CrossFireX™ mode. • Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when using multiple graphics cards for better thermal environment. 15. PCI Express 2.0 x1 slots This motherboard has two PCI Express 2.0 x1 slots that support PCI Express x1 network cards, SCSI cards, and other cards that comply with the PCI Express specifications. IRQ assignments for this motherboard PCIEx1_1 PCIEx16_1 PCIEx1_2 PCIEx16_2 ASM1143 A B C D E F G shared - - - - - - - - shared - - - - - - - shared - - - shared - - - - - - - - shared - - - - Realtek LAN controller - - shared - - - - OnChip SATA controller - - - shared - - - OnChip USB OHCI 1/2/3/4 - - shared - - - - OnChip USB EHCI 1/2/3 - shared - - - - - OnChip USB XHCI 1 - - shared - - - - OnChip USB XHCI 2 - shared - - - - - HD Audio shared - - - - - - PCI_1 - - - - shared - - PCI_2 - - - - - shared - PCI_3 - - - - - - shared When using PCI cards on shared slots, ensure that the drivers support "Share IRQ" or that the cards do not need IRQ assignments. Otherwise, conflicts will arise between the two PCI groups, making the system unstable and the card inoperable. 1-6 Chapter 1: Product introduction