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Low-profile PCIe network card with two fixed LC fiber ports

Intel

Intel X520-LR2 Bypass Adapter Low-profile PCIe 2.0 Two LC 10GBASE-LR

SKU CH-HBTQ-T3PAT

Low-profile PCIe 2.0 bypass adapter with two fixed LC 10GBASE-LR ports for 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 LC 10GBASE-LR ports for 10 km single-mode links
  • PCI Express 2.0 at 5.0 GT/s provides server-grade throughput
  • Intel 82599 controller handles iSCSI and NFS offload
  • Low-profile bracket fits 1U and compact chassis
  • Bypass mode maintains network path during power loss

Intel X520-LR2 Bypass Adapter

The Intel X520-LR2 is a low-profile network interface card built around the Intel 82599 controller. It provides two LC ports for 10GBASE-LR singlemode fibre connections. The card targets server and appliance builders who need inline bypass functionality for high-availability network paths.

PCI Express 2.0 5.0 GT/s limit

The adapter connects through a PCI Express 2.0 slot operating at 5.0 GT/s. This interface caps the theoretical throughput below what the dual 10 Gbit/s ports can collectively saturate. Singlemode fibre runs up to 5 km in bypass mode and up to 10 km in normal mode.

Low-profile bracket eases fit

The low-profile bracket allows installation in slim chassis where full-height cards cannot sit. Optics are not removable, so the transceivers cannot be swapped or upgraded independently. Bypass mode preserves the link during power loss or system failure, but requires compatible software support to activate.

Highlights

  • Dual LC 10GBASE-LR ports for 10 km single-mode links
  • PCI Express 2.0 at 5.0 GT/s provides server-grade throughput
  • Intel 82599 controller handles iSCSI and NFS offload
  • Low-profile bracket fits 1U and compact chassis
  • Bypass mode maintains network path during power loss

Specifications

BrandIntel
ModelX520-LR2 (X520LR2BPL)
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
Low-profile
Internet Small Computer System Interface (iSCSI), Network File System (NFS)

Questions about this item

Should I choose the low-profile or full-height version of the X520-LR2?

This model is low-profile only; a full-height bracket is not included.

What does the 5.0 GT/s figure mean for actual 10G throughput?

PCIe 2.0 at 5.0 GT/s gives each lane about 4 Gb/s usable bandwidth; an x8 link supplies enough headroom for both 10G ports at line rate.

How does the PCIe 2.0 interface limit the dual 10G ports?

The x8 slot provides sufficient bandwidth so the PCIe 2.0 interface does not cap the two 10GBASE-LR ports.

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