The U.S. government decommissioned the Sierra supercomputer at Lawrence Livermore National Laboratory in late 2024 after seven years of service. Once the world's second-fastest, it was built with a unique IBM-Nvidia architecture to run high-security nuclear simulations.
The primary reasons for its retirement were its natural hardware lifespan, increasing failure rates, and technological obsolescence, as replacement parts and software support became unavailable. Its successor, the more powerful El Capitan supercomputer, ultimately made continuing to operate the costly Sierra system unnecessary.
Main topics: Supercomputer decommissioning, technological lifecycle and obsolescence, high-performance computing infrastructure.