HPE 825110-B21 100Gb 1-Port 840QSFP28 InfiniBand EDR / Ethernet Adapter — the 825110-B21 is a single-port 100 Gb/s VPI adapter built on Mellanox ConnectX-5 silicon. MPN: 825110-B21. This product IS a standup PCIe adapter that operates as either InfiniBand EDR (100 Gb/s) OR 100 Gigabit Ethernet on the same QSFP28 port; it is NOT a FlexibleLOM card, NOT a 4x25G breakout NIC, NOT an HBA for SAS/FC storage. OEM: HPE. Condition: refurbished.
Engineering Context
The 840QSFP28 adapter is built around the Mellanox ConnectX-5 VPI ASIC. The QSFP28 port carries 4x25 Gb/s NRZ lanes for 100 Gb/s line rate, switchable in firmware between InfiniBand EDR and 100GbE (mlxconfig LINK_TYPE_P1). Host interface is PCIe Gen3 x16 (8 GT/s per lane, ≈128 Gb/s aggregate) — sufficient for full bidirectional 100 Gb/s line rate. Supported acceleration: RoCE v1/v2, IB Verbs, NVMe over Fabrics target/initiator, GPUDirect RDMA, ASAP² OVS offload, T10-DIF signature handover, and SR-IOV with up to 256 virtual functions.
Deployment & Use Cases
Designed for HPE ProLiant DL360 Gen9/Gen10, DL380 Gen9/Gen10, Apollo 6500/2000, and Synergy compute modules. Use cases: 100GbE leaf-to-spine uplinks for VMware vSAN and storage spines, NVMe-oF targets running over RoCE v2, EDR-fabric HPC clusters with MPI traffic, AI/ML training nodes with NVIDIA GPUs and GPUDirect RDMA, and high-throughput Ceph or ZFS NVMe storage backbones.
Technical Specifications
Brand: HPE
MPN: 825110-B21
HPE Variant Name: InfiniBand EDR/Ethernet 100Gb 1-port 840QSFP28 Adapter
Chipset: Mellanox ConnectX-5 VPI
Ports: 1x QSFP28
Data Rate: 100 Gb/s (4x25G NRZ)
Protocols: InfiniBand EDR or 100GbE (VPI, firmware-selectable)
Host Interface: PCIe Gen3 x16
Form Factor: Standup PCIe (low-profile)
RDMA: RoCE v1/v2, IB Verbs, NVMe-oF
Acceleration: GPUDirect RDMA, ASAP² OVS offload, T10-DIF
Virtualization: SR-IOV (up to 256 VFs)
Condition: Refurbished
Compatibility & Constraints
Slots into a low-profile or full-height PCIe Gen3 x16 slot in a supported HPE ProLiant server. NOT a FlexibleLOM card and NOT compatible with FLR slots. NOT a 4x25G breakout adapter — the QSFP28 port operates as a single 100 Gb link, not four independent SFP28 lanes. Mode (IB EDR vs 100GbE) is firmware-controlled with mlxconfig: both modes are supported on the same hardware but only one is active at a time per port. Pair with QSFP28 DAC, AOC, or SR4/LR4 transceivers for cabling. Some HPE switch firmware may apply transceiver/cable whitelisting.
Why Choose T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS tests all 100Gb VPI adapters for link-up at full line rate in both IB EDR and 100GbE modes prior to dispatch. Lab-verified stock, 1–3 business day handling, global shipping. Technical consultation available for HPE ProLiant 100Gb fabric design. Visit tes-itsolutions.com.