Pci_E1~4: Pcie Expansion Slots - MSI MEG Z590 UNIFY Manual

PCI_E1~4: PCIe Expansion Slots

⚠
Important
If you install a large and heavy graphics card, you need to use a tool such as MSI
∙
Gaming Series Graphics Card Bolster to support its weight to prevent deformation of
the slot.
∙ For a single PCIe x16 expansion card installation with optimum performance, using
the PCI_E2 slot is recommended.
When adding or removing expansion cards, always turn off the power supply and
∙
unplug the power supply power cable from the power outlet. Read the expansion
card's documentation to check for any necessary additional hardware or software
changes.
∙ PCI_E2 will only support x8 speed, when M2_2 and M2_3 are from CPU.
∙ PCI_E4 and M2_4 share the same bandwidth, if you want to use both of them
simultaneously, the PCI_E4 will only support x1 speed and the M2_4 will only support
x2 speed. But if you want to install and enable the graphics card in PCI_E4 slot, the
M2_4 slot should be empty.
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Overview of Components
PCI_E1: PCIe 3.0 x1 (From Z590 chipset)
PCI_E2: PCIe 4.0 x16 (From CPU)
PCI_E3: PCIe 3.0 x1 (From Z590 chipset)
PCI_E4: PCIe 3.0 x4 (From Z590 chipset)