HPE 764302-B21 - HPE FlexFabric 10Gb 4-port 536FLR-T Adapter

Brand: HPE | Category: Network Adapters & NICs

SKU: HPE-764302-B21 | Part #: 764302-B21 | MPN: 764302-B21

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HPE's FlexFabric 10Gb 4-port 536FLR-T Adapter (part number 764302-B21) delivers four independent 10 gigabit Ethernet ports in a single FlexibleLOM module, making it the standard choice for organisations upgrading ProLiant server interconnect without sacrificing motherboard slots or power budgets. This quad-port 10GbE design fits directly into the FlexibleLOM slot on compatible HPE ProLiant hardware, eliminating the need for a dedicated PCIe expansion card and simplifying cable management in dense rack deployments across data centres, AI training facilities, and enterprise compute clusters.

The 764302-B21 uses the Broadcom BCM57840S network controller and connects via 10GBASE-T (RJ-45) over standard Cat6a cabling, allowing runs up to 100 metres without additional optical conversion. This is particularly valuable in retrofits where existing copper infrastructure is already in place; many organisations deploying this adapter in GCC data centres report faster deployment timelines than planned because they avoid the cost and complexity of running new fibre. The FlexibleLOM form factor also means no PCIe slot contention—critical when your server already hosts storage controllers, GPUs, or other high-bandwidth devices. The HPE 764302-B21 sits in its own electrical pathway (PCIe 3.0 x8), leaving full expansion capacity for other peripherals.

Network engineers and infrastructure architects favour this adapter because it supports SR-IOV (Single-Root I/O Virtualisation), enabling direct assignment of individual virtual functions to guest VMs without hypervisor overhead. The Broadcom controller offloads TCP segmentation (TSO), large receive coalescing (LRO), receive-side scaling (RSS), and VLAN tag operations, which collectively reduce CPU load on the host. Checksum offload further reduces processor demand during high-throughput workloads—a meaningful efficiency gain when you're running 40+ virtual machines on a single ProLiant blade. These features are especially relevant for teams building software-defined networking stacks or consolidating workloads in VMware ESXi and Linux KVM environments.

HPE integrates the 764302-B21 directly with OneView for unified fabric management across your estate, and iLO firmware updates ensure compatibility with the latest ProLiant microcode releases. Support spans Windows Server, Red Hat Enterprise Linux, SUSE Linux Enterprise Server, and VMware ESXi, covering the vast majority of production server workloads. The adapter is certified for ProLiant Gen9 servers (DL, ML, and BL series with FlexibleLOM slots) and select Gen10 platforms, so verify your exact platform before procurement. Operating specifications are industrial-grade: 10°C to 35°C ambient, RoHS and CE/FCC compliant, ensuring the module meets regional compliance frameworks across Europe, Asia, and Middle East deployments.

System administrators tasked with capacity planning often choose the HPE FlexFabric 536FLR-T when they need to consolidate traffic from multiple virtual networks or when they're migrating from single 1GbE to 10GbE connectivity in a staged manner. The four-port design lets you segregate management, storage replication, and application traffic onto dedicated physical links, improving troubleshooting visibility and reducing broadcast storms in multi-tenant environments. Its proven Broadcom silicon and HPE's firmware validation mean fewer driver surprises in production—a factor worth emphasising when your infrastructure team is already stretched thin.

Interface & Connectivity Specifications

• Four independent 10 gigabit Ethernet ports (10GBASE-T) with RJ-45 connectors supporting Cat6a cabling to 100 metres
• Broadcom BCM57840S controller with full-featured TCP/IP offload engine (TSO, LRO, RSS, VLAN, checksum)
• FlexibleLOM slot installation (PCIe 3.0 x8 electrical) with no external power requirements
• SR-IOV virtualisation support for guest VM direct assignment and reduced hypervisor overhead
• Management integration with HPE OneView and iLO for firmware updates and health monitoring
• Multiplatform OS support: Windows Server, RHEL, SLES, and VMware ESXi
• Compatible with HPE ProLiant Gen9 and select Gen10 platforms featuring FlexibleLOM slots

Omnixon Global stocks the HPE 764302-B21 as part of our extended HPE network adapter portfolio serving data centres, AI labs, and enterprise infrastructure teams across the GCC, India, and Europe. We hold genuine HPE inventory with full technical documentation and work directly with procurement teams to streamline server builds and fabric upgrades. For specification confirmation, compatibility verification, or volume quotations, please submit an RFQ through our platform—our technical sales team responds within one business day.