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817749-B21: HPE Ethernet 10Gb 2-port BASE-T 562T Adapter

HPE 817749-B21 Network adapterPCIe 3.0 x410GbEStandup PCIe Card
HPENetwork adaptersPCIe 3.0 x4

Also listed as: 817751-001, 790316-001, X550-AT2, 562T · made by Intel

The HPE 817749-B21 (562T) is a dual-port 10GBASE-T twisted-pair copper network adapter utilizing the Intel X550 controller. It operates over standard Cat6/Cat6A UTP cabling up to 100 meters and autonegotiates between 10GbE, 5GbE, 2.5GbE, and 1GbE speeds across HPE ProLiant Gen9 and Gen10 servers. Used buyers should check RJ-45 locking tabs and inspect thermal paste condition under the heatsink.

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Specifications

Part number817749-B21
BrandHPE
Made byIntel
TypeNetwork adapters
Other numbers817751-001, 790316-001, X550-AT2, 562T
Statusend of sale
Speed10GbE
Ports2x RJ-45 10GBASE-T
InterfacePCIe 3.0 x4
Form factorStandup PCIe Card
ControllerIntel Ethernet Controller X550-AT2
Generation fitGen9 / Gen10 / Gen10 Plus

About the 817749-B21

The HPE 817749-B21, designated as the 562T adapter, is an enterprise dual-port 10GBASE-T copper Ethernet PCIe card powered by the single-chip Intel X550-AT2 controller. It provides two RJ-45 ports designed to transition data center racks to 10GbE without rewiring existing twisted-pair copper infrastructure. The adapter provides multi-rate auto-negotiation, single-root I/O virtualization (SR-IOV), and energy efficient Ethernet (EEE) standards.

Compatibility

Compatible with standard PCIe slots in HPE ProLiant Gen9, Gen10, and Gen10 Plus servers, including DL380 Gen9/Gen10, DL360 Gen9/Gen10, ML350 Gen10, and DL580 Gen10. It requires a PCIe 3.0 x4 electrical interface (fits physically into x4, x8, or x16 slots). Because 10GBASE-T copper physical layers generate higher heat than optical SFP+ cards, adequate chassis airflow over the PCIe slots is necessary.

How to identify a genuine unit

Genuine units feature an HPE security barcode sticker with Option Part Number 817749-B21, Spare Part Number 817751-001, and Assembly Part Number 790316-001. The PCB holds an Intel X550-AT2 ASIC covered by a black aluminum heatsink. Operating systems recognize the device via the Intel ixgbe driver, and iLO identifies it as 'HPE Ethernet 10Gb 2-port 562T Adapter'.

Buying used

When inspecting used 562T cards, verify that the 8 copper pins inside both RJ-45 jacks are aligned and not bent or oxidized. 10GBASE-T silicon operates hot; inspect the solder joints and PCB around the heatsink for signs of thermal discoloration or baked thermal interface material. Verify that the card negotiates link at full 10Gbps line rate on a certified Cat6A cable without dropping packets.

Reference prices (last 14 days, updated 2026-10-27)

Refurbished: USD 95 (1 sighting, Oct 2026)

Used: USD 52 (1 sighting, Oct 2026)

All sightings
SellerConditionPriceNoteSeen
serversupply.comrefurbishedUSD 95Refurbished card tested with clean 10G link2026-10-27
ebay.comusedUSD 52Working pull with standard height bracket2026-10-27

Prices seen on public listings on the dates shown, before tax and shipping. Not an offer.

Fits these models

Works together

How the HPE 817749-B21 connects to servers, storage and the network: 3 ways, with the hardware on each path.

iSCSI and NVMe/TCP over EthernetFile storage (NFS and SMB)Hyperconverged cluster

iSCSI and NVMe/TCP over Ethernet

Keep the speed the same at all three points: a 25GbE server, a 25GbE switch port and a 25GbE array port. Mixed speeds work but the slowest link sets the pace.

Switches

Storage

Optics

iSCSI and NVMe/TCP over Ethernet: how it fits together

File storage (NFS and SMB)

Front-end ports face the clients; back-end ports (on scale-out systems) connect the nodes to each other and need their own switch pair.

Switches

Storage

Optics

File storage (NFS and SMB): how it fits together

Hyperconverged cluster

Plan at least two 25GbE ports per node to two switches; all-NVMe clusters often move to 100GbE.

HCI nodes

Switches

Optics

Hyperconverged cluster: how it fits together

Plan and size it

Check compatibility with HPE

Before you buy, confirm the exact configuration against the vendor's own lists: firmware levels, operating systems, adapters and optics that HPE has tested with the HPE 817749-B21.

Equivalent part numbers

FAQ

Can the HPE 562T (817749-B21) connect to 1GbE switches?

Yes, the RJ-45 ports support auto-negotiation, automatically establishing links at 1GbE or 10GbE based on the connected switch port speed.

What cable grade is required for 10Gbps operation on 817749-B21?

Cat6 cabling supports 10Gbps up to 55 meters in low-crosstalk environments, while Cat6A or Cat7 cabling supports 10Gbps up to the full 100-meter specification.

Buying or selling 817749-B21?

New, refurbished or used. Tell us the quantity and condition and we connect you with a vetted reseller in your region, usually within one working day.

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