Nvidia already sells boatloads of computer chips to every major company building proprietary artificial intelligence models. But now, at a moment when public interest in open source and do-it-yourself AI is soaring, the company announced it will also begin offering a “personal AI supercomputer” later this year, starting at $3,000, that anyone can use in their own home or office.Nvidia’s new desktop machine, dubbed Digits, will go on sale in May and is about the size of a small book. It contains an Nvidia “superchip” called GB10 Grace Blackwell, optimized…