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Chapter 2, Primary pci express x16 slots, Universal pci express x16 slots (max. x8 mode) – Asus M4A79T Deluxe/U3S6 User Manual

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ASUS M4A79T Deluxe

2-19

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 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 2-29 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 3-22 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

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