MSI MEG Z590 UNIFY User Manual - Page 34
PCI_E1~4: PCIe Expansion Slots, Important
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PCI_E1~4: PCIe Expansion Slots 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) ⚠⚠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. 34 Overview of Components