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Green circuit board mezzanine card with two SFP ports and a gold edge connector

V2 Technologies

V2 Technologies CX4421A 2 in 1 accessory

SKU CH-5F06-J0VW8 MPN CX4421A

A two-port 25 GbE SFP28 mezzanine card for compatible Dell PowerEdge servers

  • Dual 25 GbE ports deliver high-throughput server connectivity
  • OCP 3.0 mezzanine form factor fits compatible Dell PowerEdge chassis
  • Mellanox ConnectX-4 Lx controller enables low-latency networking
  • SFP28 interfaces support direct-attach copper or optical transceivers
  • Ready for R440 R540 R640 R740 R740XD R6515 R7525 C6420

2-Port 25GbE SFP28 Mezzanine Card

The V2 Technologies CX4421A is a dual-port 25GbE SFP28 mezzanine card built for Dell PowerEdge servers. It adds high-speed network connectivity through an OCP 3.0 form factor using Mellanox ConnectX-4 Lx technology. The card installs directly into a compatible mezzanine slot. It ships as a single card without transceivers or cables.

Suits Dell R440 R540 R640 R740 R740XD R6515 R7525

This card fits the listed PowerEdge models that support an OCP 3.0 mezzanine slot with ConnectX-4 Lx compatibility. Buyers whose servers lack that specific slot type or who need a different port count or speed should look at other adapters. It is not a standalone PCIe card and will not work in standard expansion slots.

Installs in the OCP mezzanine slot

Installation requires opening the chassis, locating the designated OCP mezzanine bay, and seating the card firmly until the latch engages. Transceivers and fibre or DAC cables are purchased separately and must match the SFP28 25GbE specification. A common issue is forgetting to enable the mezzanine port in the system BIOS or iDRAC before expecting a link.

Highlights

  • Dual 25 GbE ports deliver high-throughput server connectivity
  • OCP 3.0 mezzanine form factor fits compatible Dell PowerEdge chassis
  • Mellanox ConnectX-4 Lx controller enables low-latency networking
  • SFP28 interfaces support direct-attach copper or optical transceivers
  • Ready for R440 R540 R640 R740 R740XD R6515 R7525 C6420

Specifications

No published specifications for this item yet.

Questions about this item

Which Dell PowerEdge servers accept the CX4421A mezzanine card?

The card is compatible with PowerEdge R440, R540, R640, R740, R740XD, C6420, R6515 and R7525 servers.

Does the card fit the OCP mezzanine slot in my R740?

Yes, the CX4421A uses the OCP mezzanine form factor supported by the R740.

How do I confirm the two 25 GbE SFP28 ports are active after installation?

Check the server BIOS or iDRAC for detected mezzanine adapters and verify link status lights on each SFP28 port.

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