Asus M4A79 DELUXE - Motherboard - ATX User Manual page 40

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 2-33 for the connector location.
VGA configuration
Single VGA/PCIe card
Dual VGA/PCIe card
Triple VGA/PCIe card
Quad VGA card
•
•
•
2-20
PCIex16_1
(Blue)
x16
x16
x16
x8
x8
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 3-21 for
details.
PCI Express operating mode
PCIex16_2 PCIex16_3
(Black) (Blue)
x1 x16
x1 x16
x1 x8
x8 x16
x8 x8
Chapter 2: Hardware information
PCIex16_4
(Black)
x1
x1
x8
x1
x8