Asus M4A79 DELUXE - Motherboard - ATX - Page 40

2-20 Chapter 2: Hardware information
Chapter 2
Primary PCI Express x16 slots
The primary PCI Express x16 slots support PCI Express x16 graphics cards that comply with
the PCI Express specications.
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.
• 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.
VGA conguration
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