Asus M4A89GTD PRO/USB3 - Manual (Page 38)

2-20 Chapter 2: Hardware information
Chapter 2
• In single VGA card mode, use first the PCIe 2.0 x16_2 slot (blue) for a PCI Express
x16 graphics card to get better performance.
• We recommend that you provide sufficient power when running CrossFireX™ mode.
See page 2-36 for details.
• Connect a chassis fan to the motherboard connector labeled CHA_FAN1/2 when using
multiple graphics cards for better thermal environment. See page 2-34 for details.
VGA configuration
PCI Express operating mode
PCIe x16_1
PCIe x16_2
Single VGA/PCIe card
Installed with the bundled VGA
switch card*
x16 (Recommended for single
VGA card)
Single VGA/PCIe card N/A
x8 (Recommended for single
VGA card)
Dual VGA/PCIe card x8 x8
* For working at x16 speed on the PCIe 2.0 x16_2 slot (blue), it is necessary to install the bundled VGA switch card
to the PCIe 2.0 x16_1 slot (gray).