Asus M3A79-T Deluxe - Manual (Page 45)

ASUS M3A79-T Deluxe 2-19
Primary PCI Express x16 slots
The primary PCI Express x16 slots support PCI Express x16 graphics cards that
comply with the PCI Express specifications.
Universal PCI Express x16 slots (max. x8 mode)
This motherboard also supports universal PCI Express x16 slots with a maximum
speed of 8 GB/s. The operating frequency of this slot changes, depending on the
type of PCI Express card you install. Refer to the table below for details.
If you install multiple graphics cards, we recommend that you plug the rear
chassis fan cable to the motherboard connector labeled CHA_FAN1/2 for better
thermal environment. See page 2-34 for the connector location.
• When using one graphics card and a x4 PCIe card at the same time, install
them to the blue slots.
• When using two graphics card, install them to the blue slots.
• If you install two graphics cards to the blue slots and use other x4 PCIe
cards simultaneously, the x4 PCIe cards will downgrade to x1 mode for
optimum VGA performance. You may reassign PCIe width in BIOS settings.
Refer to page 3-23 for details.
VGA configuration
PCI Express operating mode
PCIex16_1
(Blue)
PCIex16_2
(Black)
PCIex16_3
(Blue)
PCIex16_4
(Black)
Single VGA/PCIe card x16 x1 x16 x1
Dual VGA/PCIe card x16 x1 x16 x1
Triple VGA/PCIe card
x16 x1 x8 x8
x8 x8 x16 x1
Quad VGA card x8 x8 x8 x8