This is the HPE Express Bay Bridge Board (also called NVMe PCIe Bridge Controller Card or NVMe Enablement Kit component). Key details:
* Official description (from HPE Partsurfer): Express Bay bridge board — Non-Volatile Memory Express (NVMe) interface PCIe controller board with three internal 68-pin connectors for controlling up to six NVMe drives.
* Form factor: PCIe x16 full-height expansion card.
* Purpose: Acts as a bridge/switch to connect up to 6 U.2 NVMe SSDs (via Express Bay backplanes) in compatible HPE ProLiant Gen9 servers. It enables direct PCIe passthrough for high-performance NVMe storage without traditional RAID processing (it’s a bridge, not a full RAID controller, though sometimes marketed loosely as “NVMe RAID bridge”).
* Compatible servers — Primarily:
* DL380 Gen9
* DL360 Gen9
* DL560 Gen9
* DL580 Gen9
* (Possibly others with Express Bay support, like ML350 Gen9 in some setups)
* Often used in kits to add NVMe support to the front bays (requires compatible backplane, cables, and sometimes firmware updates on the board).
