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Full-height PCIe card with two fixed LC fiber ports

Intel

Intel X520LR2BP 10GBASE-LR network card

SKU CH-5YX8-W836E MPN X520LR2BP

Dual-port 10GBASE-LR server adapter with PCI Express 2.0 bypass and single-mode fibre up to 10 km

  • ConnectorsTwo LC 10GBASE-LR (Optics not removable)
  • InterfacePCI Express 2.0 (5.0 GT/s)
  • FeaturesIntel 82599 Controller Cable type: Singlemode fiber (SMF) up
  • Dual 10GBASE-LR ports for 10 km singlemode links
  • PCI Express 2.0 at 5.0 GT/s for server bandwidth
  • Intel 82599 controller handles iSCSI and NFS offload
  • Bypass mode keeps traffic flowing during power loss
  • Full-height bracket fits standard server chassis

Dual 10GBASE-LR Server Adapter

The Intel X520LR2BP is a full-height PCI Express 2.0 network card built around the Intel 82599 controller. It presents two fixed LC optics for single-mode fibre links rated to 10 km in normal mode and 5 km in bypass mode. The card targets servers and appliances that need long-reach 10 GbE connectivity without removable transceivers.

Sustained Throughput on PCIe 2.0 x8

The x8 lane interface at 5.0 GT/s supplies enough bandwidth for both ports to run at line rate simultaneously. The on-board controller handles TCP/IP offload, iSCSI and NFS acceleration in hardware, keeping CPU utilisation low during prolonged storage or backup streams. Bypass circuitry maintains the optical link even if the host loses power or hangs, preserving network topology during maintenance windows.

Full-Height Bracket and Fixed Optics

Installation requires a standard full-height slot and adequate rear-panel clearance for the dual LC connectors. Because the optics are not removable, cable routing must accommodate the bend radius of single-mode patch cords directly at the bracket. No SFP+ modules are needed, but the fixed design means a damaged connector cannot be swapped in the field.

Highlights

  • Dual 10GBASE-LR ports for 10 km singlemode links
  • PCI Express 2.0 at 5.0 GT/s for server bandwidth
  • Intel 82599 controller handles iSCSI and NFS offload
  • Bypass mode keeps traffic flowing during power loss
  • Full-height bracket fits standard server chassis

Specifications

BrandIntel
ModelX520-LR2 (X520LR2BP)
ConnectorsTwo LC 10GBASE-LR (Optics not removable)
InterfacePCI Express 2.0 (5.0 GT/s)
FeaturesIntel 82599 Controller
Cable type: Singlemode fiber (SMF) up to 5 km in Bypass Mode and up to 10 km in Normal Mode
Full height
Internet Small Computer System Interface (iSCSI), Network File System (NFS)
Shipping weight1.36 kg
Package size225 × 145 × 31 mm

Questions about this item

How much power and heat does the Intel 82599 controller produce when the X520LR2BP runs continuously?

The card uses a PCI Express 2.0 (5.0 GT/s) interface and has no removable optics, so power draw and thermal output stay within the slot specification for a full-height adapter.

What slot and cabling must I already have to install this dual-port 10GBASE-LR adapter?

You need a free full-height PCI Express 2.0 (5.0 GT/s) slot and two singlemode fiber patch cords with LC connectors rated for up to 10 km.

Will the X520LR2BP work in an older server that only has PCI Express 1.0 or 1.1 slots?

The adapter requires a PCI Express 2.0 (5.0 GT/s) connection; it is not designed for 1.0 or 1.1 slots.

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