Dell 04TRD3 — Mellanox ConnectX-5 EN 25GbE Dual SFP28 OCP 3.0 Adapter
Technical Identity
The Dell 04TRD3 is the Dell PowerEdge OEM variant of the NVIDIA Mellanox ConnectX-5 EN network adapter, delivered in the OCP 3.0 Small Form Factor (SFF) mezzanine specification. It provides two 25 Gigabit Ethernet ports over SFP28 cages, built on Mellanox's fifth-generation ConnectX-5 EN ASIC. The card is fully Dell PowerEdge qualified with Dell-signed OEM firmware. Condition: Refurbished Grade A, EU stock.
Specifications

Brand / OEM: Dell (OEM Mellanox ConnectX-5 EN)
Dell P/N: 04TRD3 (4TRD3)
ASIC: Mellanox ConnectX-5 EN (Ethernet-only)
Ports: 2 × 25 GbE
Connector: SFP28 (backward-compatible with SFP+ at 10 GbE)
Form factor: OCP 3.0 SFF mezzanine
Host interface: PCIe 3.0 x16 (via OCP 3.0 slot)
Protocol: Ethernet only (EN ASIC — no InfiniBand, no VPI)
RDMA: RoCE v1 / v2, hardware-accelerated
Storage offloads: NVMe-oF target / initiator, T10 DIF/PI, iSER, erasure coding
Network offloads: VXLAN, NVGRE, GENEVE, OVS hardware offload
Virtualization: SR-IOV (up to 256 VFs), VMware NetQueue, Multi-Host capable
OS support: Dell-qualified RHEL, SLES, Ubuntu, Windows Server, VMware ESXi
Server qualification: Dell PowerEdge 14G / 15G / 16G with OCP 3.0 SFF slot
Condition: Refurbished Grade A — EEPROM-verified, link-tested, cosmetically inspected

What This Is NOT

NOT a PCIe add-in (AIC) card. OCP 3.0 SFF mezzanine — requires a dedicated OCP 3.0 slot in the server chassis. It will NOT install in a standard PCIe expansion slot.
NOT InfiniBand. ConnectX-5 EN is the Ethernet-only ASIC variant — no IB protocol support, no VPI auto-negotiation.
NOT 100 GbE. Maximum 25 GbE per port (50 GbE aggregate). For 100 GbE, see ConnectX-5 100GbE QSFP28 variants.
NOT a generic OCP 3.0 NIC. Dell-signed OEM firmware is qualified for PowerEdge — full feature set may be restricted or blocked on non-Dell platforms.
NOT bundled with SFP28 transceivers, DAC/AOC cables, brackets, or rail kits — sold standalone.

Compatibility

Host servers: Dell PowerEdge generations with OCP 3.0 SFF mezzanine slot — including R650, R750, R6515, R7515, R6525, R7525, R660, R760, MX760c and successors.
Pairs with switches: NVIDIA Spectrum / Spectrum-2 (SN2010, SN2410, SN2700, SN3420, SN3700C), Cisco Nexus 9300, Arista 7050X / 7280R 25 GbE leaf switches.
SFP28 cabling: Mellanox MCP2M00-A0xxE (25 GbE DAC), MFA2P10-A0xxE (25 GbE AOC), and 25G-SR / 25G-LR SFP28 optical transceivers. SFP+ 10 GbE optics and DACs are also accepted for legacy fabrics.
Drivers: Dell-customized NVIDIA MLNX_OFED / mlx5_core (Linux), WinOF-2 (Windows Server), native ESXi nmlx5 driver.
Verify before deploying outside PowerEdge: Dell OEM firmware may restrict feature set or refuse to initialize on non-Dell chassis. Always validate against your target platform.

Frequently Asked Questions (FAQ)
Q. What exactly is the Dell 04TRD3?
The Dell 04TRD3 is the Dell PowerEdge OEM version of an NVIDIA Mellanox ConnectX-5 EN dual-port 25 GbE network adapter in OCP 3.0 SFF mezzanine form factor.
Q. Is 04TRD3 a PCIe add-in card?
No — it is an OCP 3.0 SFF mezzanine card. It requires a Dell PowerEdge server with a native OCP 3.0 slot. It will not install in a standard PCIe x8 or x16 expansion slot.
Q. Does 04TRD3 support InfiniBand?
No. The ConnectX-5 EN ASIC is Ethernet-only. For InfiniBand or dual-protocol VPI, a ConnectX-5 VPI variant is required.
Q. What speeds does each port support?
Each SFP28 port supports 25 GbE natively and is backward-compatible with 10 GbE using SFP+ optics or DACs.
Q. Can the 04TRD3 be used in non-Dell servers?
Physically the OCP 3.0 specification is universal. Functionally, Dell-signed OEM firmware may restrict features or block initialization outside the PowerEdge platform. Always verify on your specific chassis before deploying.
Q. Does 04TRD3 support RoCE and NVMe-oF?
Yes — full RoCE v1/v2, NVMe-oF (target and initiator), iSER, T10 DIF/PI, and SR-IOV are supported on the ConnectX-5 EN silicon.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A — every unit is EEPROM-verified, link-tested where topology allows, cosmetically inspected, and shipped from EU stock in anti-static packaging.
Why buy from T.E.S IT-SOLUTIONS
T.E.S IT-SOLUTIONS is a Europe-based data-center networking specialist serving HPC, AI, and enterprise procurement teams. Every Dell OEM Mellanox unit is identified by Dell P/N and underlying ASIC generation, EEPROM-verified, and cosmetically inspected before leaving our EU warehouse. Multi-currency B2B invoicing, worldwide express shipping, and free pre-sale technical consultation on switch / adapter / cable pairing — direct contact with our engineering team, not a call-center.