ASROCK Z370 Pro4 Handbuch Seite 20

2.4 Expansion Slots (PCI and PCI Express Slots)
There is 1 PCI slot and 5 PCI Express slots on the motherboard.
Before installing an 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.
PCI slot:
The PCI1 is used to install expansion cards that have 32-bit PCI interface.
PCIe slots:
PCIE1 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE2 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE3 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.
PCIE4 (PCIe 3.0 x16 slot) is used for PCI Express x4 lane width graphics cards.
PCIE5 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width cards.
*If PCIE5 slot or PCI slot is occupied, PCIE4 slot will run at x2 mode.
PCIe Slot Configurations
Single Graphics Card
Two Graphics Cards in
CrossFireX
For a better thermal environment, please connect a chassis fan to the motherboard's
chassis fan connector (CHA_FAN1, CHA_FAN2 or CHA_FAN3) when using mul-
tiple graphics cards.
18
PCIE2
x16
x16
TM
Mode
PCIE4
N/A
x4