NVIDIA Sync

NVIDIA Sync is a setup tool from NVIDIA that, once you've cabled together multiple units of the small AI computer DGX Spark, gets the devices to recognize each other and communicate properly. When you link several units together, a single cable ends up carrying multiple communication paths at once, and instead of having a person configure all of that by hand, this tool handles it automatically.

Think of it like adding several new printers to an office: rather than an employee typing in an address for each printer one by one, a setup program automatically finds and connects them. Cabling multiple DGX Spark units together (whether it's 2, 3, or 4 units) doesn't finish the job the moment the cables are plugged in — the devices still need to recognize one another and split up communication paths, and this tool takes care of that behind-the-scenes work.

In a setup like DGX Spark, where a single port carries multiple overlapping communication paths, simply plugging in the cable isn't the whole story. The cabling rules (how many units, whether they connect directly or through a switch) differ depending on the number of units, but the key point is that the configuration step after cabling can be simplified down to just this one tool.

Articles introducing DGX Spark connection guides mention this tool using phrases like "automatic configuration tool." It's easy to mistake it for hardware like a cable or switch, but it's actually software that runs after all the hardware is connected, handling the network configuration on your behalf. It's worth reading carefully to distinguish this step from the separate rules about cable specifications or the number of units that can be connected.