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Yes—the HPE Ethernet 10Gb 2-port 561T is a standard PCI Express network card, not an HPE-proprietary server connector. It uses a PCIe 2.1 Gen 2 x8 interface and has two copper RJ-45 ports. The similarly named 561FLR-T is different: it uses HPE FlexibleLOM and is intended for compatible servers, not an ordinary motherboard PCIe slot.
First, identify which card you have
Do not rely on the “561” name alone. The suffix tells you which installation interface to expect:
| Model | Host connection | What that means |
|---|---|---|
| HPE 561T | Standard PCIe 2.1 Gen 2 x8 add-in card | Fits an ordinary PCIe slot of suitable size and wiring, subject to clearance and system support. |
| HPE 561FLR-T | HPE FlexibleLOM form factor; PCIe 3.0 x8 internally | Uses a server-specific connection and is not a standard PCIe card for a desktop motherboard. |
HPE’s 10GbE adapter documentation distinguishes the FlexibleLOM 561FLR-T from the 561T. Their similar names do not make them interchangeable.
Visual checks before you buy or install
- Read the model marking on the card or its label: it should say 561T, not 561FLR-T.
- Check the HPE spare or option number if available, and compare it with the seller’s listing and photographs.
- A conventional 561T has a normal PCIe card-edge connector. A FlexibleLOM card has a different server-specific connector.
- The 561T has two external RJ-45 jacks. It is a copper Ethernet card, not an SFP+ fiber adapter.
- Check the bracket separately. Full-height and low-profile installations require the matching bracket; do not assume a used card includes both.
HPE’s PartSurfer listing for 717708-001 shows the two RJ-45 ports and identifies the x8 Gen 2 PCI Express slot requirement.
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- Dual-port 10Gb Ethernet 10GBASE-T Standup adapter designed for maximum network performance
- Form Factor: Plug-in card
- Interface (Bus) Type: PCI Express 2.1 x8
What the standard PCIe 561T provides
HPE specifies an Intel X540 controller, PCIe 2.1 (Gen 2) x8 host interface, and two 10GBASE-T RJ-45 ports for the 561T technical specifications. It supports 10GbE and can also link at Gigabit Ethernet when the other equipment and cabling support that speed.
“Standard PCIe” describes the card’s connection to the computer. It does not mean that every motherboard, operating system, or server is guaranteed to support it. Physical fit, slot wiring, firmware, drivers, cooling, and vendor qualification remain separate questions.
Will it fit and work in your system?
The card is intended for a PCIe slot with an x8 electrical connection. A physical x16 slot commonly accepts an x8 card, but confirm the slot is enabled and wired appropriately in the system documentation. PCIe generations normally negotiate a mutually supported link speed, so a newer slot can run a Gen 2 card; the link will use the generation supported by both ends.
Do not assume a physically open-ended x4 slot is sufficient. The manufacturer specifies x8, and whether a card operates in a lane-limited slot depends on the card and platform. Verify the motherboard or server manual rather than treating x4 operation as assured.
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- Form Factor: Plug-in card
| System | Practical expectation |
|---|---|
| Desktop with a free PCIe x16 slot | Often the simplest fit, if the slot is available, the card clears nearby components, and the operating system has a suitable driver. |
| Workstation with an x8 or x16 slot | Potentially suitable; check slot wiring, bracket height, clearance, and cooling. |
| Server with a standard PCIe riser or slot | Potentially suitable; check riser and slot configuration, platform documentation, and operating-system support. |
| HPE server with only a FlexibleLOM bay | The standard 561T is not the card for that bay; a compatible FlexibleLOM model is required. |
| Small-form-factor system | Requires the correct low-profile bracket and enough room for the card and its cooling needs. |
| System with only x4 slots | Do not assume compatibility; HPE specifies an x8 slot. |
HPE’s supported-server list covers selected ProLiant Gen9 and Apollo systems, including DL, ML, and Apollo families. That list is HPE’s qualification information, not a complete list of every computer in which a standard PCIe card might function. A card can fit and enumerate in another system without that system’s manufacturer officially supporting it.
Ports, switches, and cable requirements
The 561T’s two network ports are RJ-45 copper 10GBASE-T. They connect to compatible copper Ethernet switch ports or other 10GBASE-T equipment; they do not accept SFP+ modules or direct-attach cables.
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- Form Factor: Plug-in card
HPE’s 561T QuickSpecs give approximate 10GbE cable reach of 30 metres on CAT6 and 100 metres on CAT6A or better. Those are cable-category distance expectations, not guarantees for every installed cable: condition, termination, and the whole channel matter. For a new or longer run, CAT6A is the safer choice. CAT7 cable does not raise the adapter’s maximum speed beyond 10GbE.
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Link speed also depends on the switch or peer. If the other end supports only 1GbE, or the cable path cannot sustain 10GbE, the link may negotiate at a lower speed or fail to establish. Confirm the switch port supports 10GBASE-T and test with a known-good cable when troubleshooting.
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Drivers and installation checks
- Confirm the slot and fit. Power down, install the card in an available slot appropriate for an x8 card, secure it with the correct full-height or low-profile bracket, and ensure it does not obstruct fans or other components.
- Check firmware and slot settings. Update system firmware if needed. In servers, verify the relevant riser or PCIe slot is enabled and check any platform-specific slot or option-ROM settings.
- Confirm the system sees the adapter. On Linux, run
lspci -nn | grep -i -E 'ethernet|network'. For details, uselspci -vv -s <bus:device.function>, replacing the placeholder with the address shown bylspci. - Check the driver and interface. Intel X540 hardware commonly uses the Linux
ixgbedriver, but support depends on the operating-system version and distribution. Useful checks includeip link,ethtool <interface>, anddmesg | grep -i -E 'ixgbe|x540|firmware|ethernet'. - On Windows, inspect Device Manager. Look for an Intel X540 or 10GbE adapter and install a suitable driver package. HPE’s product support page hosts manuals and driver information; verify that a package supports your particular Windows release and platform.
- Test the network link. Connect one port at a time to a known-good 10GBASE-T switch port with suitable cable. Check link state and negotiated speed, then repeat for the second port. If 10GbE fails, test at 1GbE if possible and check switch configuration, cable, and autonegotiation.
If the card does not appear or link
- Not listed by the operating system: reseat the card, try an appropriate x8 or x16 slot, and check whether a riser, CPU configuration, or BIOS setting disables that slot.
- Listed but no working interface: check driver support and system logs; a detected PCIe device does not by itself prove the correct driver loaded.
- Interface exists but no link: test each port separately, confirm the switch port is enabled and supports 10GBASE-T, and substitute a known-good cable.
- Unstable operation under load: check the card’s seating, system airflow, and nearby heat sources. HPE lists maximum power at about 19 W in the QuickSpecs, so this is not a low-power 1GbE card.
Is the 561T the same as an Intel X540-T2?
The 561T is X540-based and broadly comparable as a dual-port X540-class 10GbE copper adapter. That does not establish that it is the same board as Intel’s retail X540-T2 or that their firmware, EEPROM, option ROM, brackets, warranty, or support are interchangeable. Do not flash Intel retail firmware onto an HPE-branded card unless authoritative documentation for that exact board explicitly supports it.
Is a used 561T still a sensible choice?
As of August 18, 2026, HPE’s product documentation identifies the 561T as retired; HPE describes it as obsolete and no longer available for sale through HPE. Used or surplus cards may still suit a homelab or other budget-conscious setup, but official current availability, warranty, and ongoing support should not be assumed.
Before buying, confirm the listing shows a standard 561T rather than a 561FLR-T, includes the bracket you need, and identifies the card clearly enough to assess its condition. Also consider the age of its driver and firmware support for your operating system, its roughly 19 W maximum power, and whether your switch uses copper RJ-45 or SFP+. For a new deployment that needs current vendor support, warranty, or newer features, compare a currently supported adapter instead of assuming this retired card meets those requirements.
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