Does the DN78C fit a regular PCIe slot?

No. It is an OCP 3.0 card with a PCIe 4.0 x8 host interface.

What warranty comes with each condition of the DN78C?

New and Refurbished: 1 year or 3 years. Used: 90 days.

Illustration

Dell

DN78C

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Dell

Dell NVIDIA ConnectX-6 Lx Dual-Port 10/25GbE SFP28 OCP 3.0 Adapter

Name: Dell NVIDIA ConnectX-6 Lx Dual-Port 10/25GbE SFP28 OCP 3.0 Adapter
Brand: Dell
SKU: DN78C

MPNDN78C

Also known as 0DN78C, CX631432A

Dell DN78C is an NVIDIA Mellanox ConnectX-6 Lx dual-port 25GbE SFP28 adapter in the OCP 3.0 form factor, with a PCIe 4.0 x8 host interface.

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Tested, cleaned and graded. Fully functional, with warranty.

Warranty

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Dell NVIDIA ConnectX-6 Lx Dual-Port 10/25GbE SFP28 OCP 3.0 Adapter

DN78C · Refurbished · 1 year warranty

Quantity (units)

Overview

Two 25GbE ports on an OCP 3.0 card, using the NVIDIA Mellanox ConnectX-6 Lx controller: that is the Dell DN78C. The card sits in the server's OCP 3.0 slot and links to the system over PCIe 4.0 x8.

Each port is an SFP28 cage, so you can use optics for fiber runs or direct-attach cables to a nearby switch. A pair of 25GbE ports is a common layout for redundant uplinks from a host to two top-of-rack switches.

The card has two alternative numbers. 0DN78C is the padded Dell form, and CX631432A is the NVIDIA OEM part number. Search any of them to reach this adapter.

New, Refurbished and Used units are available. New and Refurbished come with a choice of 1 year or 3 years of warranty; Used comes with 90 days. Confirm that your server has an OCP 3.0 slot, then send the quantity for pricing and lead time.

Specifications

Dell DN78C specifications
Manufacturer part number	DN78C
Brand	Dell
Form factor	OCP 3.0
Ports	2
Connector	SFP28
Controller	NVIDIA Mellanox ConnectX-6 Lx
Port speed	25GbE
Type	Ethernet adapter
Host interface	PCIe 4.0 x8

Alternative part numbers

Other numbers for DN78C, as printed on labels, spare-parts lists and manufacturer documents. Search works with any of them.

Alternative part numbers for DN78C
Part number	Type	Brand	Note
CX631432A	OEM equivalent	NVIDIA	NVIDIA Mellanox adapter model numberQuote this part number
0DN78C	Alternative	Same brand	Dell part number written with the leading zero (same part)Quote this part number

FAQ

What is the NVIDIA part number for the Dell DN78C?: CX631432A.
What controller is on the DN78C?: The NVIDIA Mellanox ConnectX-6 Lx.
Does the DN78C fit a regular PCIe slot?: No. It is an OCP 3.0 card with a PCIe 4.0 x8 host interface.
What warranty comes with each condition of the DN78C?: New and Refurbished: 1 year or 3 years. Used: 90 days.