ASROCK M3A790GXH/128M User Manual download pdf (Page 21)

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Installing an expansion cardInstalling an expansion card

Installing an expansion card

Step 1. Before installing the expansion card, please make sure that the power

supply is switched off or the power cord is unplugged. Please read the

documentation of the expansion card and make necessary hardware

settings for the card before you start the installation.

Step 2. Remove the system unit cover (if your motherboard is already installed in a

chassis).

Step 3. Remove the bracket facing the slot that you intend to use. Keep the screws

for later use.

Step 4. Align the card connector with the slot and press firmly until the card is

completely seated on the slot.

Step 5. Fasten the card to the chassis with screws.

Step 6. Replace the system cover.

PCIE2 / PCIE3 / SLI/XFire Switch Card Retention Slot Configurations

PCIE2 Slot PCIE3 Slot SLI/XFire Switch Card

(Green) (Blue) Retention Slot

Single Graphics Card PCIE x16 N/A

Dual Graphics Cards PCIE x8 PCIE x8

in CrossFireX

Mode

(Default)

2. In CrossFireX

mode, please reverse the direction of ASRock

SLI/XFire Switch Card, and install PCI Express x16 graphics cards

on PCIE2 and PCIE3 slots. Therefore, both these two slots will work

at x8 bandwidth.

3. In 3-Way CrossFireX

mode, please reverse the direction of ASRock

SLI/XFire Switch Card, and install PCI Express x16 graphics cards

on PCIE2, PCIE3 and PCIE4 slots. Therefore, PCIE2 and PCIE3

slots will work at x8 bandwidth while PCIE4 slot will work at x4

bandwidth.

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ASROCK M3A790GXH/128M User Manual Page 21