MCP4Y10-N001 OSFP 400G NDR InfiniBand Passive DAC Cable, 1m – NVIDIA DGX H100/H200
Warranty: Lifetime
OEM-equivalent — NVIDIA DGX H100/H200 NDR InfiniBand cable
Part Number: MCP4Y10-N001 (NVIDIA / Mellanox)
Description: OSFP Passive Direct Attach Copper (DAC) cable, 400G NDR InfiniBand-rated, 1m (3.3 ft)
The MCP4Y10-N001 is a single-port OSFP-to-OSFP passive direct-attach copper cable from NVIDIA's 400G OSFP LinkX line. It provides a direct, switch-free NDR InfiniBand link between two NVIDIA DGX H100/H200 systems at up to 400 Gb/s per port.
On the DGX H100/H200, the ConnectX-7 cluster network is exposed through OSFP ports on the rear of the system. You plug one end of this cable into an OSFP port on the first node and the other end into the matching OSFP port on the second node to link two units directly — no Quantum-2 switch required for a two-node topology. For deployments of three or more nodes, a Quantum-2 InfiniBand switch is used instead of direct DAC connections.
Technical Specifications
| Specification | Value |
| Part Number | MCP4Y10-N001 (NVIDIA / Mellanox) |
| Interface | OSFP (single port, both ends) |
| Cable Rating | 400G NDR InfiniBand (4 x 100G-PAM4 lanes) |
| Link speed on DGX H100/H200 | Up to 400 Gb/s per port |
| Cable Type | Passive Direct Attach Copper (DAC) |
| Length | 1 m (3.3 ft) |
| Connector Type | OSFP on both ends |
| Port Used | ConnectX-7 OSFP InfiniBand port |
| Fabric | NDR InfiniBand (Quantum-2 platform) |
Which Port Does This Use?
Each DGX H100/H200 has four OSFP cage positions serving eight single-port ConnectX-7 InfiniBand cards on the compute/cluster fabric. This cable plugs into those OSFP ports. Note that the DGX H100/H200 uses OSFP connectors — not QSFP-DD — for its NDR InfiniBand links.
Avoid QSFP-DD DACs (for example, the MCP1660-W-series) for this connection. Those are 400GbE Ethernet cables for Spectrum switches and will not carry NDR InfiniBand on the DGX's OSFP ports.
Good to Know
- Connects two DGX H100/H200 nodes directly — no switch, transceivers, or adapters required
- 1 m suits adjacent-rack placement; choose a 2 m length (MCP4Y10-N002) if the nodes sit in different rack positions
- Passive copper keeps power and latency low for short two-node runs
- The OSFP ports run NDR InfiniBand, not Ethernet, for GPU-to-GPU collective communication (NCCL)
- Cable support is ultimately governed by ConnectX-7 firmware; confirm against NVIDIA's official LinkX OSFP parts list
Quick Checklist — Is This the Right Cable?
You have two DGX H100 or H200 nodes with ConnectX-7 NDR OSFP ports. You want to link them directly, switch-free, for a two-node cluster. You need a single-port OSFP-to-OSFP passive copper NDR InfiniBand DAC. You want a 1 m length (or 2 m via MCP4Y10-N002) sized to your rack layout.
Related Guides
How to Connect Two NVIDIA DGX H100/H200 Systems via NDR InfiniBand DAC
COMPATIBILITY DOCUMENTATION
Compatibility report: add MCP4Y10-N001 compatibility PDF here.
Guide should include: DGX H100/H200 OSFP port verification, ConnectX-7 NDR (not HDR) confirmation, and two-node direct-connect setup notes.
OEM-equivalent — NVIDIA DGX H100/H200 NDR InfiniBand cable
Part Number: MCP4Y10-N001 (NVIDIA / Mellanox)
Description: OSFP Passive Direct Attach Copper (DAC) cable, 400G NDR InfiniBand-rated, 1m (3.3 ft)
The MCP4Y10-N001 is a single-port OSFP-to-OSFP passive direct-attach copper cable from NVIDIA's 400G OSFP LinkX line. It provides a direct, switch-free NDR InfiniBand link between two NVIDIA DGX H100/H200 systems at up to 400 Gb/s per port.
On the DGX H100/H200, the ConnectX-7 cluster network is exposed through OSFP ports on the rear of the system. You plug one end of this cable into an OSFP port on the first node and the other end into the matching OSFP port on the second node to link two units directly — no Quantum-2 switch required for a two-node topology. For deployments of three or more nodes, a Quantum-2 InfiniBand switch is used instead of direct DAC connections.
Technical Specifications
| Specification | Value |
| Part Number | MCP4Y10-N001 (NVIDIA / Mellanox) |
| Interface | OSFP (single port, both ends) |
| Cable Rating | 400G NDR InfiniBand (4 x 100G-PAM4 lanes) |
| Link speed on DGX H100/H200 | Up to 400 Gb/s per port |
| Cable Type | Passive Direct Attach Copper (DAC) |
| Length | 1 m (3.3 ft) |
| Connector Type | OSFP on both ends |
| Port Used | ConnectX-7 OSFP InfiniBand port |
| Fabric | NDR InfiniBand (Quantum-2 platform) |
Which Port Does This Use?
Each DGX H100/H200 has four OSFP cage positions serving eight single-port ConnectX-7 InfiniBand cards on the compute/cluster fabric. This cable plugs into those OSFP ports. Note that the DGX H100/H200 uses OSFP connectors — not QSFP-DD — for its NDR InfiniBand links.
Avoid QSFP-DD DACs (for example, the MCP1660-W-series) for this connection. Those are 400GbE Ethernet cables for Spectrum switches and will not carry NDR InfiniBand on the DGX's OSFP ports.
Good to Know
- Connects two DGX H100/H200 nodes directly — no switch, transceivers, or adapters required
- 1 m suits adjacent-rack placement; choose a 2 m length (MCP4Y10-N002) if the nodes sit in different rack positions
- Passive copper keeps power and latency low for short two-node runs
- The OSFP ports run NDR InfiniBand, not Ethernet, for GPU-to-GPU collective communication (NCCL)
- Cable support is ultimately governed by ConnectX-7 firmware; confirm against NVIDIA's official LinkX OSFP parts list
Quick Checklist — Is This the Right Cable?
You have two DGX H100 or H200 nodes with ConnectX-7 NDR OSFP ports. You want to link them directly, switch-free, for a two-node cluster. You need a single-port OSFP-to-OSFP passive copper NDR InfiniBand DAC. You want a 1 m length (or 2 m via MCP4Y10-N002) sized to your rack layout.
Related Guides
How to Connect Two NVIDIA DGX H100/H200 Systems via NDR InfiniBand DAC
COMPATIBILITY DOCUMENTATION
Compatibility report: add MCP4Y10-N001 compatibility PDF here.
Guide should include: DGX H100/H200 OSFP port verification, ConnectX-7 NDR (not HDR) confirmation, and two-node direct-connect setup notes.