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Green rectangular PCIe card with two SFP+ ports and silver bracket

HP

HP 788995-B21 10Gb 2-port 557SFP+ Adapter accessory

SKU CH-86AR-CJG88 MPN 788995-B21

Adds two 10Gb SFP+ ports via a PCIe 3.0 x8 card for HPE ProLiant servers

  • Accessory category10Gigabit Ethernet Card
  • Dual 10GbE ports accelerate data-centre throughput
  • PCI Express 3.0 x8 host interface reduces server CPU load
  • Two SFP+ cages support optical fibre connectivity
  • Low-profile 2.3" height fits dense ProLiant racks
  • Light 1 lb plug-in card simplifies installation

HP 10Gb 2-port 557SFP+ Adapter

The HP Ethernet 10Gb 2-port 557SFP+ Adapter is a plug-in card that adds two SFP+ ports to HP ProLiant rack and tower servers. It converges data centre traffic and offloads server networking tasks for cloud, enterprise and Telco environments. The card uses a PCI Express 3.0 x8 host interface and supports optical fibre media.

Upgrade from single-port or 1Gb adapters

This adapter replaces single-port 10Gb cards or 1Gb Ethernet NICs when a server needs dual-port 10GBase-X connectivity. The jump is worth it when workloads demand link aggregation, redundancy or higher throughput for virtualised and storage traffic. It fits HP ProLiant Gen9 and Gen10 platforms that have an available x8 slot.

Plug-in card installs in an x8 slot

Installation requires an open PCI Express 3.0 x8 slot and compatible SFP+ transceivers, which are sold separately. The low-profile form factor measures 2.3 inches by 7.5 inches and weighs approximately 1 lb. Common issues include forgetting to order optics, inserting the card into an x4 slot, or neglecting driver installation for the operating system.

How it compares

Measured against everything we stock in Cable Locks & Laptop Extras, at today’s prices. Recalculated every night.

Price $580.99
Pricier than about 91% of the 8,808 comparable items (median $16.99).

Specifications

Product
Brand nameHewlett Packard
Accessory category10Gigabit Ethernet Card
Size & build
Shipping weight0.20 kg
Package size181 × 180 × 61 mm

Questions about this item

What server chassis clearance does the 2.3" height and 9.5" depth of the 788995-B21 require?

The adapter measures 2.3 inches tall, 7.5 inches wide and 9.5 inches deep, so verify your ProLiant rack or tower server has a full-height, full-length PCIe slot with that much clear space behind the bracket.

Which PCI Express generation and lane width must the host slot provide for the 557SFP+ adapter?

Install the card into a PCI Express 3.0 x8 slot; using a narrower or older-generation slot will reduce the available bandwidth for the two 10GBase-X ports.

When should the SFP+ optical transceivers inserted into the two ports be replaced?

Replace a transceiver when link errors climb, the module overheats, or the server management log reports a failure; always use supported SFP+ optics matched to your fiber type and distance.

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