[ MODEL-SPECIFIC NETWORK HARDWARE RECORD ]

Intel Ethernet Converged Network Adapter X520-DA1

Single-port 10GbE SFP+ adapter with exact Intel ordering code E10G41BTDA. This one-port model is distinct from the already cataloged X520-DA2 and X520-T2 variants.

Original local schematic of the Intel X520-DA1 single-port SFP+ adapter — UNIQUE LOCAL SVG // SCHEMATIC, NOT TO SCALE

IDENTIFICATION: Intel model X520-DA1; ordering code E10G41BTDA. Keep the product SKU distinct from X520-DA2, X520-T2 and OEM boards using related 82599 silicon.

Exact SKU, interface and compatibility

Exact model / SKU / revision	Intel Ethernet Converged Network Adapter X520-DA1, product code E10G41BTDA. The ordering code identifies the card SKU; record board revision and Intel label from the specimen.
Controller	Intel 82599ES 10GbE controller.
Bus, ports and connectors	PCI Express 2.0 x8; one SFP+ cage. Fiber uses a compatible SFP+ optic and duplex LC fiber; direct-attach copper uses a supported SFP+ DAC.
Per-port link rates	10GbE with supported SFP+ modules/DACs. 1GbE operation is module- and driver-dependent; the adapter is not a 2.5GbE or 5GbE NBASE-T card.
Driver and operating systems	Intel’s legacy X520 package uses ixgbe on Linux and provides specified Windows Server and VMware ESXi driver bundles. The adapter is legacy; check the Intel release notes for the target OS, signed-driver availability, NVM and exact PCI ID before installation.
Compatibility caveats	Requires an electrically x8 PCIe connection for rated adapter bandwidth. Use Intel-supported optical transceivers or DACs and compatible far-end equipment; unsupported module coding or firmware can prevent link-up.
Variant warning	DA1 means one SFP+ port. Do not reuse DA2 or T2 connector counts, thermal assumptions, board outlines or SKU information.

Identification and testing

Confirm the E10G41BTDA marking, controller/device ID, SFP+ module part number and driver version. A host link reporting x4 or a lower PCIe generation can limit aggregate bandwidth even if the card fits physically.

Intel specifications and product brief

Intel Ethernet products and support indexManufacturer documentation index; use the exact DA1 ordering code to distinguish card variants.
Intel Ethernet X520 Server Adapters Product Brief (PDF)Manufacturer family product brief; compare DA1 details against the SKU entry.
Intel Ethernet SFP+ optics product brief (PDF)Manufacturer media compatibility context; confirm supported optics for this adapter and its driver.
Intel Ethernet adapter driver supportManufacturer driver and operating-system support guidance.