Genuine OEM enterprise drives · Fast US shipping · POs welcome
+1 (551) 421-5162|For businessTrack orderFAQContact
US IT Hardware - Reliable Enterprise Solutions
AccountCart (0)
Hard Drives
SSDs
Server RAM
NetworkingGPUs
Servers & JBODs
DealsGuides
Blog

Stay in the loop

Enterprise hardware deals, lead-time updates, and procurement tips.

Genuine OEM parts
Warranty backed
Fast US shipping
US IT Hardware - Reliable Enterprise Solutions

Genuine enterprise server hard drives and SSDs, sourced by exact manufacturer part number.

FacebookInstagramYouTube
Shop by brand
  • HPE
  • Dell
  • Seagate
  • Western Digital
  • IBM
  • Toshiba
  • Samsung
  • Micron
Shop by category
  • Storage Devices
  • Networking
  • Memory & RAM
  • Processors
  • Motherboards
  • Power Equipment
  • PC & Servers
  • Cables
Customer services
  • Government IT procurement
  • Part number identification
  • Track an order
  • Start a return
  • Shipping & returns
  • Return policy
  • RMA process
  • Warranty policy
  • Product certifications
Company
  • About US IT Hardware
  • For business & government
  • Guides & buying advice
  • Contact us
  • FAQ
Contact
  • 120 Stryker Lane STE 402, Hillsborough Township, NJ 08844
  • +1 (551) 421-5162
  • Sales: [email protected]
  • Claims & RMA: [email protected]
  • Support: [email protected]
  • Mon-Fri, 9am-5pm
Popular collectionsView all collections →
Recertified hard drivesEnterprise SAS drivesEnterprise SATA drivesEnterprise SSDsNVMe enterprise SSDs15K RPM SAS drives10K RPM SAS drives7200 RPM SATA drivesSeagate ExosWD UltrastarDell SSDsHP hard drives600GB SAS drives900GB SAS drives1.2TB SAS drives3.84TB SSDs2.5-inch SFF drives3.5-inch LFF drivesEnterprise hard drives

© 2026 US IT Hardware, a trading name of Mountech Cables LLC. All rights reserved. Manufacturer names and part numbers are used for identification only.

TermsPrivacy·Secure checkout · Visa · Mastercard · Amex · PO terms
  1. Home
  2. All parts
  3. 647586-B21
HPE

HPE 647586-B21 FlexFabric 10Gb 2-port Adapter

MPN: 647586-B21·By: HPE

Part #:647586-B21NewIn stock

Ships from the US.

$175.00
Qty
HPE 647586-B21 FlexFabric 10Gb 2-port Adapter-
$175.00
$175.00
Qty
HPE 647586-B21 FlexFabric 10Gb 2-port Adapter-
$175.00

Order by 1:00 PM CST for overnight shipping

Buying in volume or need a PO?

Have a target price for 647586-B21? Call +1 (551) 421-5162 or request a bulk quote and our sales team will reply within one business day.

Have questions?

Talk to our customer service team.

PhoneEmail

Product overview

The HPE FlexFabric 10Gb 2-port 554FLB Adapter 647586-B21 is a dual-port 10Gb Ethernet FlexibleLOM designed for HPE c-Class ProLiant BladeSystem servers in designated FlexibleLOM slots. It provides two 10Gb ports that together deliver up to 40 Gbps aggregate full duplex theoretical bandwidth, with each port supporting 20,000 Mbps full duplex Ethernet transfer rate. The adapter supports Virtual Connect Flex-10, allowing each 10Gb port to be divided into four connections when used with compatible interconnects. It requires a minimum of 2 GB of server memory for proper operation. The 554FLB adapter supports linking at 1000 Mbps or 10000 Mbps when not connected to a Flex-10 device. When connected to a 1Gb Ethernet interconnect, the adapter operates at 1000 Mbps, helping environments align link speeds with existing blade enclosure networking.

  • Dual 10Gb Ethernet ports for blade servers
  • Up to 40 Gbps aggregate full duplex bandwidth
  • Supports Virtual Connect Flex-10 partitioning
  • Operates at 1000 or 10000 Mbps link speeds
  • FlexibleLOM design for c-Class ProLiant blades
  • Requires minimum 2 GB of server memory
  • Expedited and overnight shipping options are available at checkout, priced by destination and service.
  • Purchase orders accepted from qualified institutions.
  • Refunds within 14 days and replacements within 30 days of delivery with an RMA (25% restocking fee on customer-initiated returns), and every part carries our Standard 30-Day Warranty - see our return policy or contact US IT Hardware.

Featuring

Manufacturer part #647586-B21
BrandHPE
ConditionNew
ModelFlexFabric 10Gb 2-port 554FLB Adapter
Bus TypePCI Express 2.0 x8
Data RateTwo ports, each at 20 Gb/s bidirectional; 40 Gb/s aggregate bidirectional theoretical bandwidth
Form FactorFlexibleLOM
Product LineHPE FlexFabric Adapters
Product Type10Gigabit Ethernet card
Onboard Memory128 MB
Protocols SupportedTCP/IP; TOE; FCoE; iSCSI

Compatible systems

Blade FlexibleLOM 10GbE adapter for selected HPE ProLiant Gen8 blade servers.

  • HPE ProLiant BL
    Model: BL460c Gen8; BL420c Gen8; BL465c Gen8; BL660c Gen8; WS460c Gen8
    Form factor: Blade
    Generation: Gen8

    Quickspec for 647586-B21 lists supported servers as HPE ProLiant BL460c Gen8, BL420c Gen8, BL465c Gen8, BL660c Gen8, WS460c Gen8.

Best for

  • BladeSystem networking

    Suitable for HPE c-Class ProLiant BladeSystem servers using designated FlexibleLOM slots, leveraging the dual 10Gb ports for high-throughput blade networking.

  • 10Gb Ethernet consolidation

    Useful where two 10Gb ports with up to 40 Gbps aggregate full duplex bandwidth are required to consolidate multiple traffic types on fewer physical links.

  • Virtual Connect Flex-10 environments

    Designed for deployments using Virtual Connect Flex-10, where each 10Gb port can be divided into multiple connections to support segmented workloads on blade servers.

  • Mixed 1Gb and 10Gb links

    Applicable in environments needing both 1000 Mbps and 10000 Mbps link options, with support for 1000 Mbps operation when connected to a 1Gb Ethernet interconnect.

  • Memory-constrained blades

Details

Shipping, warranty & returns

Customer reviews

No reviews yet — be the first to review this part.

Write a review

Free ground shipping over $100

Secure SSL checkout. Visa, Mastercard, Amex and Discover accepted. ACH / wire available for businesses.

Buy with confidence

New, certified-refreshed and OEM stock with guaranteed compatibility, backed by warranty on every part.

Business account benefits
  • Net payment terms
  • Dedicated account rep
  • Warehousing & scheduled releases
  • Stock testing reports
Set up your business account →
Govt, federal & edu procurement

We process quotes, POs, stock documentation and compliance invoicing.

[email protected]
Link Speeds Supported1000 Mbps or 10000 Mbps when not connected to a Flex-10 device; 1000 Mbps when connected to 1 Gb Ethernet interconnect

Performance

Aggregate Bandwidth40 Gbps aggregate full duplex theoretical bandwidth
Supported Media Type10GBase-KR backplane

Power Consumption

Power Consumption8.6 W idle; 10 W maximum

Networking Ports & Interfaces

Ports2 x 10GbE ports
Host InterfacePCIe 2.0 x8
Network ProcessorEmulex BE3
Interface Supported10Gb Ethernet; FCoE; iSCSI

Fits blade configurations that can allocate at least 2 GB of server memory, meeting the adapter’s minimum memory requirement for reliable operation.

Frequently asked questions

What type of servers is the HPE 647586-B21 554FLB adapter designed for?

The HPE FlexFabric 10Gb 2-port 554FLB Adapter 647586-B21 is designed for HPE c-Class ProLiant BladeSystem servers. It installs into the designated FlexibleLOM slots on Gen8 c-Class ProLiant blades, integrating with the blade enclosure’s networking architecture. This makes it suitable for environments standardized on HPE BladeSystem infrastructure.

What aggregate bandwidth does the HPE 554FLB Adapter provide?

The adapter provides dual 10Gb ports, each capable of 20,000 Mbps full duplex Ethernet transfer rate. Combined, these ports deliver up to 40 Gbps aggregate full duplex theoretical bandwidth per adapter. This throughput supports demanding workloads and enables consolidation of multiple traffic types onto a single FlexibleLOM adapter in blade servers.

Does the HPE 647586-B21 support Virtual Connect Flex-10 technology?

Yes, the HPE FlexFabric 10Gb 2-port 554FLB Adapter supports Virtual Connect Flex-10. With compatible Virtual Connect Flex-10 interconnects, each 10Gb port on the adapter can be divided into four connections. This allows administrators to allocate bandwidth to multiple logical network functions from a single physical 10Gb port.

What link speeds are supported by the HPE FlexFabric 10Gb 2-port 554FLB Adapter?

The adapter supports linking at 1000 Mbps or 10000 Mbps when it is not connected to a Flex-10 device. When it is connected to a 1Gb Ethernet interconnect, it operates at 1000 Mbps. These options allow deployment in mixed 1Gb and 10Gb environments and facilitate gradual upgrades to higher-speed networking.

Is there a minimum server memory requirement for the HPE 554FLB adapter?

Yes, the HPE FlexFabric 10Gb 2-port 554FLB Adapter requires a minimum of 2 GB of server memory. This requirement ensures that the blade server has sufficient resources to support the adapter’s networking functions. When planning configurations, IT teams should verify that each blade meets or exceeds this memory threshold.

Related products

You might also want to check out these products.

  • NewMCX713106AS-VEAT - NVIDIA
    NVIDIAMCX713106AS-VEAT

    NVIDIA ConnectX-7 Ethernet Adapter MCX713106AS-VEAT

    Get a quoteShop →
  • NewP-5GS6-GL - Cisco
    CiscoP-5GS6-GL

    Cisco P-5GS6-GL

    Get a quoteShop →
  • New430-3793 - Dell
    Dell430-3793

    430-3793 - Dell Intel X520-DA2 2-Ports SFP+ Ethernet Network Adapter

    Get a quoteShop →
  • New11230BNHMW - Dell
    Dell11230BNHMW

    11230BNHMW - Dell Centrino Wireless-N 1030 11230BNHMW IEEE 802.11b/g/n Mini PCI-Express WLAN Network Card for Inspiron N7110

    Get a quoteShop →
  • New3C589D - 3Com
    3Com3C589D

    3C589D - 3Com EtherLink III 1 x Port 10Mb/s 10Base-T PC Card Ethernet Network Adapter Card

    Get a quoteShop →
  • Refurbished555-BCKO - Dell
    Dell555-BCKO

    555-BCKO - Dell X710 2-Ports 10Gb/s SFP+ + 2-Ports 1GbE Daughter Card

    $185.00Shop →
  • New430-4398 - Dell
    Dell430-4398

    430-4398 - Dell Broadcom 57810S-K 2 x Ports 10GbE PCI Express 2.0 x8 Network Daughter Card

    Get a quoteShop →
  • New430-3638 - Dell
    Dell430-3638

    430-3638 - Dell Intel X520-DA2 2-Ports SFP+ 10GbE PCIe Network Adapter

    Get a quoteShop →