Dell 0V5DG9 — Mellanox ConnectX-5 EN 25GbE Dual-Port SFP28 PCIe 3.0 x16
Technical Identity
The Dell 0V5DG9 is a Dell OEM Mellanox ConnectX-5 EN network interface card with dual-port 25GbE SFP28 and PCIe 3.0 x16 host interface. Dell-qualified and validated for PowerEdge server platforms. Delivers RoCE v2, NVMe-oF, and VXLAN/NVGRE offloads at 25GbE line rate. Condition: Refurbished Grade A.
Specifications

Brand: Dell (OEM Mellanox ConnectX-5)
Dell PN: 0V5DG9
Underlying ASIC: Mellanox ConnectX-5 EN
Product type: Ethernet Network Adapter (NIC)
Ports: 2× 25GbE SFP28
Host interface: PCIe 3.0 x16
Protocol: Ethernet only (EN variant — no InfiniBand)
Server qualification: Dell PowerEdge
Offloads: RoCE v2, NVMe-oF, VXLAN/NVGRE, SR-IOV with multiple VFs
Condition: Refurbished Grade A

What This Is NOT

NOT InfiniBand. Ethernet EN variant — no IB support. For VPI dual-protocol see ConnectX-5 VPI parts.
NOT 100GbE. 25GbE per port maximum. For 100GbE step up to ConnectX-5 Ex or ConnectX-6 Dx 100G adapters.
NOT a standard NVIDIA retail card. Dell OEM firmware — features may be locked or behave differently outside Dell PowerEdge platforms.
NOT supplied with cables or SFP28 transceivers — sold as the adapter only.

Compatibility & Constraints

Primary platform: Dell PowerEdge servers (R-series, MX, FX). May function in third-party servers — verify Dell OEM firmware behavior before deploying outside PowerEdge.
Switch side: Any 25GbE SFP28-capable switch — NVIDIA Spectrum (SN2010 / SN2100 / SN2410), Cisco Nexus 9000, Arista 7050X.
Cables / optics: SFP28 DAC up to ~5 m for short-range copper, SFP28 AOC for mid-range, SFP28 SR optics over OM3/OM4 MMF.
Software: MLNX_OFED, NVIDIA DOCA-Host, or Linux/Windows inbox driver. Dell OpenManage / iDRAC for firmware management on PowerEdge.
PCIe slot: PCIe 3.0 x16 mechanical and electrical. Will operate in PCIe 4.0/5.0 slots negotiated down to PCIe 3.0 link rate.

Frequently Asked Questions (FAQ)
Q. What is the Dell 0V5DG9?
Dell OEM Mellanox ConnectX-5 EN: dual 25GbE SFP28, PCIe 3.0 x16. PowerEdge qualified. Supports RoCE v2, NVMe-oF, VXLAN/NVGRE offload.
Q. Is the Dell 0V5DG9 InfiniBand capable?
No — Ethernet EN variant only. For InfiniBand support choose a ConnectX-5 VPI variant.
Q. Can the 0V5DG9 be used in non-Dell servers?
Possibly — the ConnectX-5 ASIC is standard, but Dell OEM firmware may restrict features outside PowerEdge. Verify firmware behavior before deployment.
Q. What offloads does the 0V5DG9 support?
RoCE v2, NVMe-oF, VXLAN/NVGRE hardware offload, and SR-IOV with multiple virtual functions.
Q. What condition does T.E.S IT-SOLUTIONS supply?
Refurbished Grade A — EEPROM-verified, link-tested where topology permits, cosmetically inspected, EU stock.
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 since 2007. Every unit is MPN-identified, EEPROM-verified, and cosmetically inspected before leaving our EU warehouse. Multi-currency B2B invoicing, worldwide express shipping, and free pre-sale compatibility consultation for switch / adapter / cable pairing — included at no extra cost.