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Technical Data Sheet
PartsTable / NETWORK / 766490-B21
766490-B21 ✓ Verified by PartsTable
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 FLEXFABRIC 10GB 2-PORT 536FLB ADAPTER

HP FLEXFABRIC 10GB 2-PORT 536FLB ADAPTER. 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→ 766490-B21
SPECIFICATIONS
Part Number766490-B21
ManufacturerHP
Capacity10GB
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 766490-B21 MFR HP HP FlexFabric 10GB 2-Port 536FLB Adapter
KEY FEATURES
•
10GB Capacity
VERIFIED SUBSTITUTES & CROSS-REFERENCES 3
768080-001Compatible
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S)
compatible
766488-001Compatible
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S)
compatible
766491-B21Compatible
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S) FIO
compatible
LIFECYCLE
StatusUNKNOWN
Availability—
RoHS CompliantEAR99ESD SensitiveNot HAZMAT
THIS PART SUBSTITUTES FOR 3
766488-001SUBSTITUTE
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S)
HPE
766491-B21SUBSTITUTE
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S)
HPE
768080-001SUBSTITUTE
HP NIC 536FLR-SFP+ 10GbE 2-Port PCI-E-3.0x8 FlexFabric FlexibleLOM (QLogic 57840S)
HPE
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FREQUENTLY ASKED QUESTIONS
What is 766490-B21?
766490-B21 is a HP FlexFabric 10GB 2-Port 536FLB Adapter manufactured by HP. It is classified as a NETWORK (10GBE_NIC).
What parts can replace 766490-B21?
There are 3 known substitutes for 766490-B21: 768080-001, 766488-001, 766491-B21. Substitute compatibility should be verified for your specific system.
Is 766490-B21 still available?
766490-B21 is currently Unknown.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026