Full Article can found at Japan university tackles supercomputer’s memory problem

Pegasus boasts 120 of Nvidia’s cutting-edge H100 graphics-processing units. The same technology was used in the Lenovo-built Henri, which was crowned the world’s most energy-efficient supercomputer in November.

These are combined with state-of-the-art central processing units from Intel, giving Pegasus a theoretical peak performance of 6.5 petaflops — 6.5 quadrillion floating point operations per second.
……
……

Persistent memory is also used in addition to conventional DRAM. Accessing data from it takes longer than from DRAM. But it consumes less energy and promises around 10 times the capacity at a similar cost, according to the center. Persistent memory can handle both temporary and long-term data storage

…..

Using persistent memory allows Pegasus to tap more of its capabilities without requiring a major increase in cost or energy consumption.

Japan university tackles supercomputer’s memory problem