Nvidia will start selling its DGX Spark “personal AI supercomputer” this week. The machine is powerful enough to let users work on sophisticated AI models but small enough to fit on a desktop. Nvidia said Spark can be ordered online at nvidia.com starting Wednesday, October 15th, as well as from select partners and stores in the US. It has not revealed final pricing but said units would cost $3,000 when it revealed Spark earlier this year. Most PC makers have their own customized version, with