ASROCK Fatal1ty X99X Killer/3.1 Serie Handbuch Seite 22

2.4 Expansion Slots (PCI Express Slots)
here are 5 PCI Express slots and 1 mini-PCI Express slot on the motherboard.
Before installing an expansion card, please make sure that the power supply is switched of
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.
PCIe slots:
PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE3 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE4 (PCIe 2.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE5 (PCIe 3.0 x16 slot) is used for PCI Express x8 lane width graphics cards.
* If M.2 PCI Express module is installed, PCIE5 will be disabled.
mini-PCIe slot:
MINI_PCIE1 (mini-PCIe slot) is used for WiFi module.
PCIe Slot Conigurations (For CPU with 40 PCIe lanes)
Single Graphics Card
Two Graphics Cards in
CrossFireX
Mode
hree Graphics Cards in
3-Way CrossFireX
or 3-Way SLI
18
PCIE1
x16
TM TM
x16
or SLI
TM
x16
Mode
TM
Mode
PCIE2 PCIE3 PCIE4
N/A N/A
N/A x16
N/A x16
PCIE5
N/A N/A
N/A N/A
N/A x8