Asus M5A99FX PRO R20 M5A99FX PRO R2.0 User's Manual - Page 37
IRQ assignments for this motherboard, On Chip USB_1 - how many crossfirex
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• In single VGA card mode, use the PCIe 2.0 x16_1 slot (navy blue) 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_3 slots for PCI Express x16 graphics cards to get better performance. • We recommend that you provide sufficient power when running CrossFireX™ or SLI™ mode. Refer to page 2-28 for details. • 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 PCIe x16_1 A B C D E F G H shared - - - - - - - PCIe x16_2 PCIe x16_3 PCIe x16_4 PCIe x1 PCI ASM SATA shared - - - - - - - shared - - - - - - - - - - shared - - - - - - - - - - shared - - - - shared - - - - - - - shared - - - USB 3.0_1 - - - - - shared - - USB 3.0_2 - - - - - - shared - Realtek 8111F (LAN) - - - - - - - shared On Chip SATA - - - shared - - - - On Chip USB_1 - - shared - - - - - On Chip USB_2 - - - - shared - - - On Chip USB_3 - - - - - - shared - HD Audio shared - - - - - - - Chapter 1 ASUS M5A99FX PRO R2.0 1-23