NJAAKK-N911 QSFP112 400G-Rated Passive DAC Cable, 0.5m – Stacking Cable for NVIDIA DGX Spark, ASUS, Dell, HP & Lenovo GB10 (NJAAKK-0006 Equivalent)
Warranty: Lifetime
The DGX Spark stacking cable, in stock and shipping same day. A 0.5 m QSFP112 passive DAC built to the specification of the Amphenol NJAAKK-0006 that NVIDIA lists as approved for DGX Spark. Plug it into the ConnectX-7 QSFP ports on two Sparks and they are linked, with no switch needed.
- $174. New, with a lifetime warranty
- Free U.S. shipping; ships same day on orders before 5 PM ET from Knoxville, Tennessee
- 31-day returns, return shipping on us (details)
- Validated on ConnectX-7 in DGX Spark (compatibility report)
- Fits NVIDIA DGX Spark, ASUS Ascent GX10, Dell Pro Max GB10 and HP ZGX Nano AI Station
→ DGX Spark & GB10 Clustering Guide: which cable to buy at two, three and four or more nodes, approved part numbers, and real-world throughput.
What You Are Buying
Part number: NJAAKK-N911
Length: 0.5 m (1.6 ft)
Equivalent to: Amphenol NJAAKK-0006 (0.5 m) and the Luxshare LMTQF022-SD-R
Type: QSFP112 passive direct-attach copper, 400G-rated
Also listed as: LMTQF022-SD-R equivalent
This is a compatible cable supplied by Resilient Tec. It matches the same QSFP112 passive copper specification and works normally in DGX Spark and GB10 systems.
On a DGX Spark each ConnectX-7 QSFP port runs at up to 200 Gb/s (NVIDIA's port limit), so the link runs at 200 Gb/s even though the cable is 400G-rated.
Part Numbers You May Be Searching For
Several part numbers circulate for the DGX Spark stacking cable. They are one cable specification from two manufacturers in two lengths. If you are shopping for any of them, this 0.5 m cable does the same job.
| Part number | Maker | OEM length |
|---|---|---|
| NJAAKK-0006 · NJAAKK0006 · SF-NJAAKK0006-000.5M | Amphenol | 0.5 m |
| NJAAKK-N911 | Amphenol | 400 mm |
| LMTQF022-SD-R | Luxshare | 400 mm |
| NJAAKKR-0006 | Compatible-market spelling | 0.5 m |
Compatible suppliers commonly sell the NJAAKK-N911 number at 0.5 m, which is what this listing is. The extra 10 cm makes no difference on the desktop, and it gives you more slack between units side by side or in a rack.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | NJAAKK-N911 |
| OEM equivalent | Amphenol NJAAKK-0006 (0.5 m) |
| Interface | QSFP112 on both ends |
| Cable rating | 400G-rated (4 x 100G lanes) |
| Link speed on DGX Spark / GB10 | Up to 200 Gb/s per port (NVIDIA port limit) |
| Cable type | Passive direct-attach copper (DAC) |
| Length | 0.5 m (50 cm / 1.6 ft) |
| Port used | ConnectX-7 QSFP port, Ethernet mode with RoCE |
| Condition / warranty | New / lifetime |
How Many Cables Do You Need?
| Nodes | Topology | Switch | Cables |
|---|---|---|---|
| 2 | Point to point | No | 1 × this cable |
| 3 | Ring (both ports per node) | No | 3 × this cable |
| 4 | Ring, custom NCCL (not NVIDIA-supported) | No | 4 × this cable. In a rack, wire it folded (1→2→4→3→1) so 0.5 m reaches. |
| 4+ | Through a switch | Yes | One 200G DAC per node, or an MCP7H60 breakout on the switch side |
A switch is the supported route at four nodes and the only route beyond. How the four-node switchless ring works
Related Guides
NVIDIA DGX Spark Stacking Cable NJAAKK-N911: What It Does and Who Needs It
NJAAKK-N911 vs NJAAKK-0006 vs LMTQF022-SD-R: What's the Difference?
How to Connect Two NVIDIA DGX Spark Systems
DGX Spark Interconnect Reference: NJAAKK-N911, NJAAKK-0006 and LMTQF022-SD-R
Compatibility documentation: NJAAKK-N911 compatibility report (PDF): DGX Spark and OEM GB10 notes, ConnectX-7 port verification, and dual-system setup steps.
Building on a budget? A 200G QSFP56 DAC such as the MCP1650-V00AE30 ($79) also links two Sparks, though it is not one of the parts NVIDIA names.
The DGX Spark stacking cable, in stock and shipping same day. A 0.5 m QSFP112 passive DAC built to the specification of the Amphenol NJAAKK-0006 that NVIDIA lists as approved for DGX Spark. Plug it into the ConnectX-7 QSFP ports on two Sparks and they are linked, with no switch needed.
- $174. New, with a lifetime warranty
- Free U.S. shipping; ships same day on orders before 5 PM ET from Knoxville, Tennessee
- 31-day returns, return shipping on us (details)
- Validated on ConnectX-7 in DGX Spark (compatibility report)
- Fits NVIDIA DGX Spark, ASUS Ascent GX10, Dell Pro Max GB10 and HP ZGX Nano AI Station
→ DGX Spark & GB10 Clustering Guide: which cable to buy at two, three and four or more nodes, approved part numbers, and real-world throughput.
What You Are Buying
Part number: NJAAKK-N911
Length: 0.5 m (1.6 ft)
Equivalent to: Amphenol NJAAKK-0006 (0.5 m) and the Luxshare LMTQF022-SD-R
Type: QSFP112 passive direct-attach copper, 400G-rated
Also listed as: LMTQF022-SD-R equivalent
This is a compatible cable supplied by Resilient Tec. It matches the same QSFP112 passive copper specification and works normally in DGX Spark and GB10 systems.
On a DGX Spark each ConnectX-7 QSFP port runs at up to 200 Gb/s (NVIDIA's port limit), so the link runs at 200 Gb/s even though the cable is 400G-rated.
Part Numbers You May Be Searching For
Several part numbers circulate for the DGX Spark stacking cable. They are one cable specification from two manufacturers in two lengths. If you are shopping for any of them, this 0.5 m cable does the same job.
| Part number | Maker | OEM length |
|---|---|---|
| NJAAKK-0006 · NJAAKK0006 · SF-NJAAKK0006-000.5M | Amphenol | 0.5 m |
| NJAAKK-N911 | Amphenol | 400 mm |
| LMTQF022-SD-R | Luxshare | 400 mm |
| NJAAKKR-0006 | Compatible-market spelling | 0.5 m |
Compatible suppliers commonly sell the NJAAKK-N911 number at 0.5 m, which is what this listing is. The extra 10 cm makes no difference on the desktop, and it gives you more slack between units side by side or in a rack.
Technical Specifications
| Specification | Value |
|---|---|
| Part Number | NJAAKK-N911 |
| OEM equivalent | Amphenol NJAAKK-0006 (0.5 m) |
| Interface | QSFP112 on both ends |
| Cable rating | 400G-rated (4 x 100G lanes) |
| Link speed on DGX Spark / GB10 | Up to 200 Gb/s per port (NVIDIA port limit) |
| Cable type | Passive direct-attach copper (DAC) |
| Length | 0.5 m (50 cm / 1.6 ft) |
| Port used | ConnectX-7 QSFP port, Ethernet mode with RoCE |
| Condition / warranty | New / lifetime |
How Many Cables Do You Need?
| Nodes | Topology | Switch | Cables |
|---|---|---|---|
| 2 | Point to point | No | 1 × this cable |
| 3 | Ring (both ports per node) | No | 3 × this cable |
| 4 | Ring, custom NCCL (not NVIDIA-supported) | No | 4 × this cable. In a rack, wire it folded (1→2→4→3→1) so 0.5 m reaches. |
| 4+ | Through a switch | Yes | One 200G DAC per node, or an MCP7H60 breakout on the switch side |
A switch is the supported route at four nodes and the only route beyond. How the four-node switchless ring works
Related Guides
NVIDIA DGX Spark Stacking Cable NJAAKK-N911: What It Does and Who Needs It
NJAAKK-N911 vs NJAAKK-0006 vs LMTQF022-SD-R: What's the Difference?
How to Connect Two NVIDIA DGX Spark Systems
DGX Spark Interconnect Reference: NJAAKK-N911, NJAAKK-0006 and LMTQF022-SD-R
Compatibility documentation: NJAAKK-N911 compatibility report (PDF): DGX Spark and OEM GB10 notes, ConnectX-7 port verification, and dual-system setup steps.
Building on a budget? A 200G QSFP56 DAC such as the MCP1650-V00AE30 ($79) also links two Sparks, though it is not one of the parts NVIDIA names.