Cray J90

The Cray J90 is a series of air-cooled vector processor supercomputers that Cray Research first announced in 1994, code-named Jedi during development. It evolved from the Cray Y-MP EL minisupercomputer and stayed compatible with Y-MP software, running the same UNICOS operating system. The later models supported up to 32 CMOS processors with a 10 nanosecond clock, or 100 MHz, up to 4 gigabytes of main memory and up to 48 gigabytes per second of memory bandwidth. That gave it considerably less performance than the contemporary Cray T90, but made it a strong competitor among technical computers in its price range. The line came in three configurations, the J98 with up to eight processors, the J916 with up to 16 and the J932 with up to 32. Each processor used one chip for its scalar part and another for its vector part. In 1997 the J90se, short for Scalar Enhanced, doubled the scalar speed to 200 MHz and added support for the GigaRing input and output system.