hands on Nvidia bills its long-anticipated DGX Spark as the "world's smallest AI supercomputer," and, at $3,000 to $4,000 (depending on config and OEM), you might be expecting the Arm-based mini-PC to outperform its less-expensive siblings. But the machine is far from the fastest GPU in Nvidia's lineup. It's not going to beat out an RTX 5090 in large language model (LLM) inference, fine tuning, or even image generation — never mind gaming. What the DGX Spark, and the slew of GB10-based systems h...