ASROCK 990FX Extreme9 User Manual page 18

2.4 Expansion Slots (PCI and PCI Express Slots)
There is 1 PCI slot and 5 PCI Express slots on this motherboard.
PCI Slot: PCI slot is used to install expansion cards that have the 32-bit PCI
interface.
PCIE Slots:
PCIE1 (PCIE x16 slot) is used for PCI Express x16 lane width graphics
cards.
PCIE2 (PCIE x1 slot) is used for PCI Express cards with x1 lane width
cards, such as ASRock Game Blaster, Gigabit LAN card, SATA card.
PCIE3 (PCIE x16 slot) is used for PCI Express x4 lane width graphics
cards.
PCIE4 (PCIE x16 slot) is used for PCI Express x16 lane width graphics
cards.
PCIE5 (PCIE x16 slot) is used for PCI Express x8 lane width graphics
cards.
Single Graphics Card
Two Graphics Cards in
TM TM
CrossFireX or SLI
Three Graphics Cards in
TM
3-Way CrossFireX or
TM
3-Way SLI Mode
1. In single VGA card mode, it is recommended to install a PCI Express
x16 graphics card in the PCIE1 slot.
2. In CrossFireX
x16 graphics cards in PCIE1 and PCIE4 slots. Both these two slots
will work at x16 bandwidth.
3. In 3-Way CrossFireX
PCI Express x16 graphics cards in PCIE1, PCIE4 and PCIE5 slots.
PCIE1 will work at x16 bandwidth, while PCIE4 and PCIE5 slots will
work at x8 bandwidth.
4. Please connect a chassis fan to the motherboard's chassis fan
connector (CHA_FAN1, CHA_FAN2 or CHA_FAN3) when using
multiple graphics cards for better thermal environment.
18
PCIE Slot Confi gurations
PCIE1 PCIE2
x16 N/A
x16 N/A
Mode
x16 N/A
TM TM
mode or SLI mode, please install the PCI Express
TM
mode or 3-Way SLI
ASRock 990FX Extreme9 Motherboard
PCIE3 PCIE4 PCIE5
N/A N/A N/A
N/A x16 N/A
N/A x8 x8
TM
mode, please install the