Product Description
IBM EJ24 PCIe x16 to CXP Converter Card
The IBM EJ24 PCIe x16 to CXP Converter Card (CCIN 6B92, part number 02WF391) is a high-performance PCIe Gen4 x16 to CXP adapter designed for IBM Power Systems servers. This single-slot converter card transforms a PCIe Gen4 x16 slot into a single CXP port, enabling high-speed active optical cable (AOC) connectivity to NVMe expansion drawers (such as the ESR0 NED24) or other CXP-based I/O devices, delivering up to 400 Gbps aggregate bandwidth for low-latency, high-throughput NVMe storage expansion in Power10 and select Power9 configurations.
Product Description
The IBM EJ24 (feature code EJ24, CCIN 6B92, part number 02WF391) is a PCIe Gen4 x16 to CXP converter adapter that occupies a single PCIe Gen4 x16 slot on the host server. It provides one CXP port (QSFP28-based, 4-lane) for attaching active optical cables (AOC) or compatible CXP copper cables, delivering up to 400 Gbps aggregate bandwidth (4 × 100 Gbps lanes) over optical fiber for ultra-low-latency, high-throughput NVMe storage expansion. The adapter is engineered specifically for connecting the ESR0 NED24 NVMe Expansion Drawer (24 × U.2 NVMe bays) to Power10 and Power11 servers (and select Power9 models with Gen4 support), enabling massive scale-out NVMe flash capacity without additional PCIe switches or complex cabling. It supports hot-plug AOC cables, direct PCIe extension for NVMe-oF-like performance, and full IBM qualification for reliability, power management, and firmware integration. The EJ24 is a critical component for modern Power10 AIX, IBM i, and Linux environments needing high-density, high-performance NVMe storage expansion.
Features
- PCIe Gen4 x16 host interface with one CXP port output.
- Supports active optical cables (AOC) for long-distance, low-latency NVMe connectivity.
- Up to 400 Gbps aggregate bandwidth (4 × 100 Gbps lanes) over fiber.
- Designed for attachment of ESR0 NED24 NVMe Expansion Drawer (24 × U.2 NVMe SSDs).
- Hot-plug AOC/cable support for zero-downtime maintenance.
- Low-latency PCIe extension for NVMe-oF-like performance.
- Power management and thermal optimization for enterprise reliability.
- Full IBM firmware integration and qualification for Power11/Power10/Power9 servers.
- Backward compatible with select Gen3 configurations (reduced bandwidth).
Technical Specifications
- Feature Code: EJ24
- CCIN: 6B92
- Part Number: 02WF391
- Interface (Host): PCIe Gen4 x16 (single slot)
- Interface (Device): 1 × CXP port (QSFP28-based, 4-lane)
- Bandwidth: Up to 400 Gbps aggregate (4 × 100 Gbps per lane)
- Form Factor: PCIe full-height, half-length card
- Cable Support: Active Optical Cables (AOC) recommended; compatible CXP copper cables (short reach)
- Reach: Up to 100 m (AOC fiber, typical); copper limited to ~3–5 m
- Power Consumption: ~15–25 W (configuration dependent)
- Cooling: Passive heatsink; relies on server airflow
- Status Indicators: Link/activity LEDs on CXP port
- Compatibility: Power11 and Power10 (primary), select Power9 Gen4 slots
Compatibility
The IBM EJ24 PCIe x16 to CXP Converter Card is compatible with:
- Power Systems Models:
- Power11 models 9824-22A (S1122) and 9824-42A (S1124)
- Power10: S1012/S1014/S1022/S1022s/S1024 (scale-out), E1080 (enterprise), and other Power10 models with PCIe Gen4 slots
- Power9: Select models with PCIe Gen4 slots (e.g., S922/S924/E950/E980 with Gen4-capable slots)
- Operating Systems: AIX 7.2+ / 7.3+, IBM i 7.4+ (TR1+ for NVMe expansion), Linux (RHEL/SUSE/Ubuntu), VIOS
- Attachment: PCIe Gen4 x16 slot on host server; connects to ESR0 NED24 NVMe Expansion Drawer via AOC
- Cables: IBM-qualified CXP AOC (lengths vary, typically 3–50 m); copper CXP for short reach
- Storage Target: ESR0 NED24 (24 × U.2 NVMe SSD bays)
- Limitations: Requires PCIe Gen4 slot and compatible firmware; not backward compatible with Gen3 CXP devices at full speed; copper limited to short distances
Verify exact slot requirements, cable part numbers, firmware levels, and OS TR/patch levels via IBM Sales Manual or resources for your specific Power Systems model.
Warranty
This product comes with a 60-day warranty covering parts and functionality.
