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Small OCP 3.0 card with dual SFP28 cages and thumbscrew bracket

NVIDIA

NVIDIA ConnectX-6 Lx 25GbE Dual SFP28 OCP 3.0 PCIe 4.0 x8 MCX631432AC-ADAB network card

SKU CH-N749-WW6DE MPN MCX631432AC-ADAB

Dual-port SFP28 25GbE OCP 3.0 adapter with PCIe 4.0 x8 host interface and secure boot

  • Rated speedData Rate: Ethernet 1/10/25 Gb/s
  • Connection typesDual SFP28 Ethernet (copper and optical)
  • Temperature rangeOperational: 0 degree Celsius to 55 degrees Celsius Non-oper
  • Humidity rangeOperational: 10% to 85% relative humidity Non-operational: 1
  • Seller noticeREGULATORY Safety: CB / cTUVus / CE EMC: CE / FCC / VCCI / I
  • Key featuresPHYSICAL Form Factor: Small Form Factor (SFF) OCP 3.0 PROTOC
  • Dual SFP28 ports support copper and optical links at 1/10/25 Gb/s
  • OCP 3.0 SFF form factor fits dense server chassis
  • PCIe 4.0 x8 interface delivers 16.0 GT/s throughput
  • Hardware crypto and secure boot protect data in flight
  • Operates from 0 °C to 55 °C with 10 % to 85 % humidity

Dual 25GbE SFP28 OCP 3.0 adapter

The NVIDIA ConnectX-6 Lx is a dual-port 25GbE network card built to the OCP 3.0 small form factor. It installs in a PCIe 4.0 x8 slot and supports 1, 10 and 25Gb/s Ethernet over copper or optical SFP28 modules. Hardware crypto and secure boot are included for platform-level security.

Suits servers needing two 25GbE links in OCP 3.0

This card fits OCP 3.0 bays that accept an SFF adapter with a thumbscrew bracket. It will not suit builds that require a standard PCIe bracket, single-port density, or speeds beyond 25Gb/s. Buyers needing 100GbE or a different form factor should select another model.

PCIe 4.0 x8 interface with 16.0GT/s SERDES

The adapter connects through an eight-lane PCIe 4.0 bus running at 16.0GT/s per lane, also compatible with 2.0 and 1.1 link speeds. This lane count and signalling rate determine whether the host platform can deliver full 25Gb/s throughput on both ports simultaneously.

How it compares

Measured against everything we stock in Ethernet Cards & NICs, at today’s prices. Recalculated every night.

Price $501.99
Pricier than about 88% of the 1,505 comparable items (median $90.99).

Specifications

Product
Brand nameNVIDIA
Model nameConnectX-6
Part numberMCX631432AC-ADAB
Performance
Rated speedData Rate: Ethernet 1/10/25 Gb/s
Ports & slots
Connection typesDual SFP28 Ethernet (copper and optical)
Size & build
Product dimensions4.52 in × 2.99 in (115 mm × 76 mm)
Shipping weight9.07 kg
Package size297 × 287 × 205 mm
Environment & compliance
Temperature rangeOperational: 0 degree Celsius to 55 degrees Celsius
Non-operational: -40 degrees Celsius to 70 degrees Celsius
Humidity rangeOperational: 10% to 85% relative humidity
Non-operational: 10% to 90% relative humidity

Questions about this item

How much heat does the ConnectX-6 Lx generate when running at 25 Gb/s all day?

The card draws up to 12V and 3.3VAUX power; each SFP28 port can supply 1.5W to a module. Operational temperature range is 0 to 55 °C.

What must my server already have to install this OCP 3.0 adapter?

An available OCP 3.0 SFF slot with PCIe 4.0 x8 electrical connection (also compatible with PCIe 2.0 and 1.1) and 12V plus 3.3VAUX supply rails.

Will my older 10 GbE SFP+ direct-attach cables work with the dual SFP28 ports?

Yes. The ports support 10GBASE-CR and 10GBASE-KR protocols, so 10 GbE copper or optical SFP+ modules and cables will link at 10 Gb/s.

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