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656596-B21 — Network Technical Data

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HP · NETWORK · 10GBE_NIC
WHAT YOU NEED TO KNOW
RJ45 = copper (needs CAT6) | SFP+ = fiber (needs transceiver) FLR = FlexibleLOM (HPE integrated) — NOT standard PCIe
Bracket height MUST match chassis — Full Height (2U) vs Low Profile (1U)
PRODUCT OVERVIEW
HP ETHERNET 10GB 2-PORT BASE-T 57810S ADAPTER

HP ETHERNET 10GB 2-PORT BASE-T 57810S ADAPTER. Key specifications include Wi-Fi: No, Internal: Yes, Interface: Ethernet, Full duplex: Yes, Ethernet LAN: Yes, Host interface: PCI Express. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
NETWORK→ 10GBE_NIC→ 656596-B21
SPECIFICATIONS
Wi-FiNo
InternalYes
InterfaceEthernet
Full duplexYes
Ethernet LANYes
Host interfacePCI Express
Quick start guideYes
Networking standardsIEEE 802.1Q, IEEE 802.3, IEEE 802.3ab, IEEE 802.3ae, IEEE 802.3u
Connectivity technologyWired
Ethernet LAN data rates10,100,1000,10000 Mbit/s
Ethernet LAN (RJ-45) ports2
Maximum data transfer rate10000 Mbit/s
COMPONENT DIAGRAM
NIC CTRL PHY 0 PHY 1 ROM VRM SFP+ SFP+ LINK ACT PCIe x8 ~167 mm NETWORK ADAPTER | 2-PORT 10GbE | SFP+ | Full Height PCIe x8 | Link/Activity LEDs | PXE boot ROM TITLE NIC ADAPTER PN 656596-B21 MFR HP HP Ethernet 10GB 2-Port Base-T 57810s Ad
KEY FEATURES
•
Yes
•
10GB Capacity
TYPICAL APPLICATIONS
  • Data center top-of-rack switching
  • High-speed server interconnects (10G/25G/40G/100G)
  • Storage network fabric (iSCSI, FCoE)
  • Campus and branch network infrastructure
  • Firewall and security appliance connectivity
  • WAN edge and SD-WAN deployments
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
657128-001Compatible
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S)
compatible
656594-001Compatible
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S)
compatible
Q2P91ACompatible
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S) for StoreEasy
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
Q2P91ASUBSTITUTE
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S)
HPE
656594-001SUBSTITUTE
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S)
HPE
657128-001SUBSTITUTE
HP NIC 530T 10GbE RJ-45 2-Port PCI-E-2.0x8 Ethernet Controller (Broadcom BCM57810S)
HPE
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394791-B21
CIRCUIT CARD ASSEMBLY
516733-B21
HP ProCurve 6120XG Blade Switch
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FREQUENTLY ASKED QUESTIONS
What is 656596-B21?
656596-B21 is a HP Ethernet 10GB 2-Port Base-T 57810s Adapter manufactured by HP. It is classified as a NETWORK (10GBE_NIC).
What parts can replace 656596-B21?
There are 3 known substitutes for 656596-B21: 657128-001, 656594-001, Q2P91A. Substitute compatibility should be verified for your specific system.
Is 656596-B21 still available?
656596-B21 is currently Unknown.
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Last verified: September 2026