ASROCK Fatal1ty B250M Performance Serie Manual Del Usuario página 22

2.4 Expansion Slots (PCI Express Slots)
There are 4 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.
PCIe slots:
PCIE1 (PCIe 3.0 x16 slot) is used for PCI Express x16 lane width graphics cards.
PCIE2 (PCIe 3.0 x1 slot) is used for PCI Express x1 lane width 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.
PCIe Slot Configurations
Single Graphics Card
Two Graphics Cards in
CrossFireX
1. For a better thermal environment, please connect a chassis fan to the mother-
board's chassis fan connector (CHA_FAN1 or CHA_FAN2) when using multiple
graphics cards.
2. If PCIE2 slot or PCIE3 slot is occupied, the PCIe-type M.2 device on M2_1 socket
will run at Gen3 x2 (16 Gb/s).
18
PCIE1
x16
x16
TM Mode
PCIE4
N/A
x4