Hpe Storage Controller - Plug-in Card - Low Profile Components 726821-B21 PCI Express Gen3 x8 link width delivers high performance and data bandwidth up to 8GT/s theoretical maximum bandwidth Supports legacy and UEFI boot operation on Gen9 servers The HP Smart Cache feature (HP Smart Cache license is required on P440) is a controller-based read caching solution in a DAS environment that caches the most frequently accessed data ("hot" data) onto HP Secure Encryption is a Smart Array controller-based data encryption solution for ProLiant Gen9 servers that protects sensitive, mission critical data Mix-and-match SAS and SATA hard drives lets you deploy drive technology as needed to fit your computing environment