ASRock 990FX Extreme9 manual Expansion Slots PCI and PCI Express Slots, Pcie Slots

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.

PCIE Slot Configurations

	PCIE1	PCIE2	PCIE3	PCIE4	PCIE5
Single Graphics Card	x16	N/A	N/A	N/A	N/A
Two Graphics Cards in	x16	N/A	N/A	x16	N/A
CrossFireXTM or SLITM Mode
Three Graphics Cards in	x16	N/A	N/A	x8	x8
3-Way CrossFireXTM or
3-Way SLITM Mode

1.In single VGA card mode, it is recommended to install a PCI Express x16 graphics card in the PCIE1 slot.

2.In CrossFireXTM mode or SLITM mode, please install the PCI Express x16 graphics cards in PCIE1 and PCIE4 slots. Both these two slots will work at x16 bandwidth.

3.In 3-Way CrossFireXTM mode or 3-Way SLITM mode, please install the 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.

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