Not much to look at, but its "El Capitan," as of November 2024, the world's fastest supercomputer. It is in use at Lawrence Livermore National Laboratory in Tennessee. As of March, 2024, the fastest one WAS "Frontier," built by Cray. It was overtaken in November by El Capitan, built by Hewlitt-Packard in cooperation with AMD Corporation.
One of it's many purposes is to improve AI-driven scientific discovery, enabling simulation of nuclear explosions, instead of the old method of drilling a hole somewhere in Nevada and blowing up a nuclear bomb in it.
It runs at 1.742 exaflopsii and achieves 58.89 gigaflops performance per watt. (I know one of you who knows what that means.) Admittedly, I don't know what that means, but I DO know it is quick as a bunny-rabbit on steroids. It generates enough heat that it requires 28,000 tons of liquid cooling. Holy mother of hell.
Hey, if it will run Notepad, Wordpad, email and my appointment book, I'd be happy. That said, Livermore National Lab would be highly suspicious of my appointment book.