HPE FlexFabric 5940 48SFP+ 6QSFP28 Switch At least one power supply is required for operation (not included); two free power supply slots. Two free slots for fans (front/back or back/front; not included); two fans required for operation. Includes: 2 x rack bracket 2 x short rack rail PSU bay cover Please note: Mixing different types of power supplies is not possible.