ASRock M3A790GXH/USB3 User Manual - Page 18

Expansion Slots PCI and PCI Express Slots

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Page 18 highlights

2.4 Expansion Slots (PCI and PCI Express Slots) There are 2 PCI slots and 4 PCI Express slots on this motherboard. PCI Slots: PCI slots are used to install expansion cards that have the 32-bit PCI interface. PCIE Slots:PCIE1 (PCIE x1 slot; White) is used for PCI Express cards with x1 lane width cards, such as Gigabit LAN card and SATA2 card. PCIE2 (PCIE x16 slot; Blue) is used for PCI Express x16 lane width graphics cards, or used to install PCI Express graphics cards to support CrossFireXTM function. PCIE3 (PCIE x16 slot; Blue) is used to install PCI Express graphics cards to support CrossFireXTM function. PCIE4 (PCIE x16 slot; White) is used for PCI Express x1 lane width cards, such as Gigabit LAN card, SATA2 card, etc., or used to install PCI Express graphics cards to support 3-Way CrossFireXTM function. 1. If you plan to install only one PCI Express VGA card on this motherboard, please install it on PCIE2 slot. In this mode, you do not need to adjust the default setting of ASRock SLI/XFire Switch Card, and please do not remove or lose ASRock SLI/XFire Switch Card when it is still in working condition. 2. In CrossFireXTM 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 CrossFireXTM 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. 18

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2.4 Expansion Slots (PCI and PCI Express Slots)
2.4 Expansion Slots (PCI and PCI Express Slots)
2.4 Expansion Slots (PCI and PCI Express Slots)
2.4 Expansion Slots (PCI and PCI Express Slots)
2.4 Expansion Slots (PCI and PCI Express Slots)
There are 2 PCI slots and 4 PCI Express slots on this motherboard.
PCI Slots:
PCI slots are used to install expansion cards that have the 32-bit PCI
interface.
PCIE Slots:
PCIE1 (PCIE x1 slot; White) is used for PCI Express cards with x1 lane
width cards, such as Gigabit LAN card and SATA2 card.
PCIE2 (PCIE x16 slot; Blue) is used for PCI Express x16 lane width
graphics cards, or used to install PCI Express graphics cards to support
CrossFireX
TM
function.
PCIE3 (PCIE x16 slot; Blue) is used to install PCI Express graphics
cards to support CrossFireX
TM
function.
PCIE4 (PCIE x16 slot; White) is used for PCI Express x1 lane width
cards, such as Gigabit LAN card, SATA2 card, etc., or used to install
PCI Express graphics cards to support 3-Way CrossFireX
TM
function.
1. If you plan to install only one PCI Express VGA card on this
motherboard, please install it on PCIE2 slot. In this mode, you do not
need to adjust the default setting of ASRock SLI/XFire Switch Card,
and please do not remove or lose ASRock SLI/XFire Switch Card when
it is still in working condition.
2. In CrossFireX
TM
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
TM
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.