Model Number: 726897 B21Product features: Supports up to 16 drives without need for expander cardSeamless upgrades to and from other HP Smart Array controllersRecovery Read-Only Memory (ROM) protects against ROM corruptionCapable of supporting both legacy and Unified Extensible Firmware Interface (UEFI) boot operation on Gen9 servers4GB Transportable Flash-backed write cache (Not all of which is available for user data)PCIe 3.0 8 x Host interface provides up to 8 GiB/s in each direction12 Gb/s SAS Performance when used on Gen9 servers with 12 Gb/s devices (Hard Disk Drive (HDD) or Solid State Drive (SSD))12 Gb/s SAS Technology delivers up to 1200 MB/s per physical link6 Gb/s SATA Technology delivers up to 600 MB/s for directly attached SATA drivesMix And Match SAS and SATA drivesHP SSD Smart Path feature included in the Smart Array software stackHP SmartCache feature included with P840 controllerHP Secure Encryption, available as an option, is a Smart Array controller-based data encryption solution for ProLiant Gen9 serversPerformance:12 Gb/s SAS (1200 MB/s Theoretical bandwidth per physical lane)4 GiBytes 72 bit wide DDR3 1866 FBWC provides up to 14.9 GB/s maximum cache bandwidthPCI Express Gen3 x 8 link widthRead ahead cachingWrite Back cachingPorts: 16 SAS/SATA Physical links distributed across 2 double wide Mini SAS 8i connectorsWarranty: 1 year Warranty