The J90 evolved from the Cray Y-MP EL minisupercomputer, and is compatible with Y-MP software, running the same UNICOS operating system. The J90 supported up to 32 CMOS processors with a 10 ns (100 MHz) clock. It supported up to 4 GB of main memory and up to 48 GB/s of memory bandwidth, giving it considerably less performance than the contemporary Cray T90, but making it a strong competitor to other technical computers in its price range.
The J90 was derived from the Cray Y-MP EL minisupercomputer and shared software compatibility with the Y-MP system, utilizing the same UNICOS operating system. The J90 could accommodate up to 32 CMOS processors running at a clock speed of 10 ns (100 MHz), offering 4 GB of main memory and 48 GB/s of memory bandwidth. While less powerful than the contemporary Cray T90, it was a competitive option in its price range for other technical computers.