- Slot 1 (top): PCIe Gen3 x8 (x8 mechanical with x4 electrical lanes)*
- Slot 2: PCIe Gen3 x16
- Slot 3: PCI Express Gen3 x16 with x8 connector (requires 2nd CPU)
- Slot 4: PCIe Gen3 x16 (requires 2nd CPU)
- Slot 5: PCIe Gen2 x4 slot, with x8 connector
- Slot 6: PCIe Gen3 x16
- Slot 7: PCI 32bit/33MHz
Slot 1 Mechanical-only slot, supporting cards which mount only to the I/O bulkhead and not the motherboard (half-length, full-height)
*The PCIe x8 connectors are open ended, allowing a PCIe x16 card to be seated in the slot.