HPE FlexFabric 5980 48SFP+ 6QSFP28 Switch At least one power supply is required for operation (not included); two available power supply slots. 5 x free slots for fans (front/back or back/front; not included); four fans required for operation. Includes: 2 x rack bracket 2 x Rack rail PSU bay cover Please note: Mixing different types of power supplies is not possible.