ASUS Ascent GX10 Cluster Cable: 0.5m QSFP112 400G DAC
To cluster two ASUS Ascent GX10 workstations you need one 0.5m QSFP112 400G passive DAC cable in the QSFP112 port on each unit. The GX10 is built on NVIDIA's GB10 Grace Blackwell platform with the same ConnectX-7 NIC as the DGX Spark, so it takes the exact cable NVIDIA approves in its Spark Stacking documentation (Amphenol NJAAKK0006 / Luxshare LMTQF022-SD-R spec). Petronella Technology Group, Inc. keeps it in stock at $159 with free US shipping, while distributors quote $179 to $229 and are usually backordered.
The ASUS Ascent GX10 is the most popular OEM build of NVIDIA's GB10 platform after the DGX Spark Founders Edition, which means a lot of GX10 owners reach the same wall: the box is ready to cluster, but the one cable that links two of them is hard to source. The interconnect is identical to every other GB10 system, so the cable below is the right part.
| Cable | 0.5m QSFP112 400G passive direct-attach copper (DAC) |
| Approved spec | Amphenol NJAAKK0006 / Luxshare LMTQF022-SD-R (NVIDIA Spark Stacking docs) |
| Fits | Both QSFP112 ports on the ASUS Ascent GX10 ConnectX-7 NIC |
| For two units | One cable |
| For a three-node ring | Three cables (switchless, each box uses both ports) |
| Price | $159, free US shipping (in stock) |
Clustering your ASUS Ascent GX10 units: how many cables and when you need a switch
Each ASUS Ascent GX10 has two QSFP112 ports, so it follows the NVIDIA-documented GB10 topology: two units link directly with one cable, and three units form a switchless ring with three cables (NVIDIA's "Connect Three DGX Spark in a Ring Topology" playbook, each box using both ports for full pairwise connectivity). Three nodes is the switchless ceiling - with only two ports per unit, four or more units need a 200G-class QSFP switch. Clustering pools memory to run a model too large for one 128 GB node; it is a capacity play, not a speed boost, since each link runs around 25 GB/s. Our team can design and build the cluster if you would rather hand off the networking.