MSI B150 TOMAHAWK AC - Expansion Slots and SATA Connectors

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Overview of Components
PCI_E1~5, PCI1~2: PCIe and PCI Expansion Slots
PCI_E1: PCIe 3.0 x1 slot
PCI_E2: PCIe 3.0 x16 slot
PCI_E4: PCIe 3.0 x1 slot
PCI_E3: PCIe 3.0 x1 slot
PCI_E5: PCIe 3.0 x4 slot
PCI1: PCI slot
PCI2: PCI slot
Multiple graphics cards installation recommendation
x16
x16
x4
Important
For a single PCIe x16 expansion card installation with optimum performance, using the
PCI_E2 slot is recommended.