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Green PCB network adapter with two SFP+ cages and a gold PCIe x8 edge connector

Solarflare Communications, Inc.

Solarflare Communications, Inc. SFN8522-PLUS Dual-Port 10GbE SFP+ network card

SKU CH-7XXJ-NB415 MPN SFN8522-PLUS

Dual-port 10GbE SFP+ adapter with PCIe 3.1 x8 host interface and sub-microsecond latency

  • Speed10Gbps
  • InterfacePCI Express 3.1 x8
  • FeaturesProduct Type:10Gigabit Ethernet Card Expansion Slot Type: SF
  • Weight0.55
  • Dual 10GbE ports deliver 10Gbps bandwidth per connection
  • PCI Express 3.1 x8 host interface supports up to 40Gbps aggregate throughput
  • XtremePacket Engine enables 1000s of flows and virtual NICs per adapter
  • UKB technology provides extreme application acceleration with sub-microsecond latencies
  • RoHS certified plug-in module weighs .55kg measuring 2.7in by 5.3in

Dual-Port 10GbE SFP+ Adapter

The Solarflare SFN8522-PLUS is a dual-port 10GbE SFP+ network adapter designed for servers requiring high-throughput optical connectivity. It installs into a PCI Express 3.1 x8 slot and presents two SFP+ cages for fiber transceivers. The low-profile plug-in module form factor fits dense server chassis while delivering enterprise-grade networking capabilities.

Upgrade from Single-Port or 1GbE Links

This card replaces single-port 10GbE adapters or dual-port 1GbE NICs when aggregate bandwidth above 10Gbps is needed. The jump is worth it for workloads that saturate a single 10GbE link, such as storage replication, virtualisation clusters, or high-frequency trading feeds. It also consolidates two physical ports into one PCIe slot, freeing expansion capacity for other accelerators.

Sustained Load Behaviour

Under continuous traffic the adapter sustains bandwidth up to 40Gbps aggregate across both ports with latencies below 1µsec. The XtremePacket Engine manages 1000s of flows and virtual NICs per adapter without head-of-line blocking. On-board telemetry captures packets for real-time monitoring while NIC-level filtering enforces secure server lockdown during prolonged operation.

Highlights

  • Dual 10GbE ports deliver 10Gbps bandwidth per connection
  • PCI Express 3.1 x8 host interface supports up to 40Gbps aggregate throughput
  • XtremePacket Engine enables 1000s of flows and virtual NICs per adapter
  • UKB technology provides extreme application acceleration with sub-microsecond latencies
  • RoHS certified plug-in module weighs .55kg measuring 2.7in by 5.3in

Specifications

BrandSolarflare
ModelSFN8522-PLUS
Speed10Gbps
InterfacePCI Express 3.1 x8
FeaturesProduct Type:10Gigabit Ethernet Card
Expansion Slot Type: SFP+
Form Factor: Plug-in Module
Weight0.55
Shipping weight0.21 kg
Package size229 × 163 × 38 mm

Questions about this item

Does the SFN8522-PLUS require a PCIe 3.1 x8 slot and a low-profile bracket?

Yes, it installs in a PCI Express 3.1 x8 slot and its plug-in module form factor measures 2.7 inches by 5.3 inches, matching low-profile server brackets.

What is the correct way to seat the SFP+ modules so the card links at 10Gbps?

Insert each transceiver straight into the cage until the latch clicks, then attach the fibre cables; the adapter supports 10GBase-X optical media on both ports.

When should the SFP+ transceivers be replaced to keep latency below 1µsec?

Swap a transceiver when link errors rise or optical power drops below the module’s rated threshold; the card itself has no moving parts and weighs 0.55 units.

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