
Why buy from us?
HardwareJet is built for professionals who need dependable hardware without delays or guesswork. Our curated network of manufacturers ensures quality parts, fair pricing, and responsive service.
Ask a Question About This Product
Ships from outside of the USA. Please allow up to 2 weeks for delivery.
- In Stock: 2
- Manufacturer: HP
- Model or Part: 766491-B21
- Condition: Refurbished
- Weight: 3.00lb
United States Shipping
Orders over $200 qualify for Free Super-Saver Shipping! We ship at our discretion via the most cost-effective method using FedEx, UPS, or USPS.To ensure your order is processed efficiently, all shipping charges must be pre-paid at checkout. We are unable to bill directly to third-party shipper accounts or use customer-provided labels for domestic shipments.
International Shipping
International orders begin processing as soon as payment is confirmed.- Pre-paid Shipping: For your convenience, you can select and pay for international shipping directly at checkout.
- Carrier Accounts: Alternatively, we can bill transport costs directly to your FedEx account number. (Note: We cannot bill to DHL, TNT, or UPS accounts).
- Customer Labels: We are also happy to ship internationally using pre-paid labels provided by you for any carrier.
Expedited and Rush Shipping
Need it faster? HardwareJet.com offers 1 or 2-day expedited shipping options during checkout for eligible items.To get your order to the front of the line, expedited orders include a small rush fee in addition to the carrier's shipping charges. If an item is not available for expedited shipping, these options will not appear in your cart.
Item Condition
New - Sealed or Open Box ConditionExcellent - Almost-New, Missing Original Packaging
Refurbished - Seller Refurbished, Good Condition, Previously Used Item
To bring you an even wider selection, some of our items are shipped directly from our trusted partners. Delivery times may vary for these items.
Overview
The HP FlexFabric 10GB 2-Port 536FLB Adapter (part number 766491-B21) delivers high-performance, low-latency connectivity for modern data center servers. Designed to fit seamlessly into a standard PCIe slot, this adapter provides two independent 10 Gigabit Ethernet ports that support both copper and fiber optic cabling options. It is engineered for reliability in demanding virtualized environments, cloud infrastructures, and storage networks, helping you maximize throughput while reducing bottlenecks.
Key Features
- Dual 10GbE ports with independent configuration for flexible network design
- PCIe Gen3 x8 interface ensures optimal data transfer rates
- Support for both RJ45 (copper) and SFP+ (fiber) transceivers, allowing mixed media deployments
- Advanced offload capabilities such as checksum offloading, TCP segmentation offload and VLAN tagging to reduce CPU overhead
- Hot-plug ready for minimal downtime during upgrades or maintenance
- Energy efficient design with low power consumption per port
Technical Specifications
- Model: 766491-B21 (FlexFabric 10GB 2-Port 536FLB)
- Form factor: Full height, half length PCIe card
- PCIe interface: Gen3 x8
- Ports: 2 x 10GbE (RJ45 or SFP+ interchangeable)
- Maximum throughput: 20 Gbps aggregate
- Supported protocols: Ethernet II, IEEE 802.3ae, IPv4, IPv6
- Operating temperature: 0 to 50 degrees Celsius
- Power consumption: Approx 7 watts per port under full load
Applications
- Virtualized server environments requiring high bandwidth for VM traffic
- High-performance computing clusters that need low latency interconnects
- Enterprise storage area networks (SAN) and network attached storage (NAS) systems
- Cloud service providers building scalable, multi-tenant infrastructure
- Data analytics platforms processing large data sets in real time
- Financial trading floors where microsecond latency can impact outcomes
This HP FlexFabric adapter combines speed, flexibility and reliability to meet the rigorous demands of today's enterprise networks.