Cray C90

The Cray C90 series, first named the Y-MP C90, was a vector processor supercomputer launched by Cray Research in 1991 as a development of the Cray Y-MP architecture. Each processor had a dual vector pipeline and a faster 4.1 nanosecond clock, about 244 megahertz, which together gave roughly three times the performance of a Y-MP processor, and a system could carry up to 16 processors instead of eight. It ran the UNICOS operating system on the same Model E input and output subsystem as the Y-MP Model E. The series included the C94, C98 and C916 with four, eight and sixteen processors, plus air-cooled C92A and C94A models, and D-series variants with slower, denser DRAM that allowed up to 16 gigabytes of memory. The Cray T90 was its successor system.