Cray CS6400
The Cray Superserver 6400, or CS6400, was a multiprocessor server computer system produced by Cray Research Superservers, Inc., a subsidiary of Cray Research and launched in 1993. The CS6400 was closely related to Sun Microsystems' SPARCcenter 2000 system and was based on the same SuperSPARC microprocessor and XDBus packet-switched bus. However, the CS6400 could be configured with four to 64 processors, compared with the SPARCcenter 2000's maximum of 20. The CS6400 also ran the same Solaris 2 operating system as Sun's servers.
The CS6400 was available with either 60 MHz SuperSPARC-I or 85 MHz SuperSPARC-II processors. Maximum RAM capacity was 16 GB.
The CS6400 was also sold as the Amdahl SPARCsummit 6400E[1].
Upon Silicon Graphics' aquisition of Cray Research in 1996, the Superserver business (by now the Cray Business Systems Division) was sold to Sun. This included Starfire, the CS6400's successor then under development, which was to become the Sun Enterprise 10000.