the same time, Cray Research was also working on the Y-MP, a faster multi-processor version of the system architecture tracing its ancestry to the original Cray-1. In order to focus the Y-MP and Cray-3 groups, and with Cray's personal support, the Cray-3 project moved to a new research center in Colorado Springs. By 1989, the Y-MP was starting deliveries, and the main CRI lab in Chippewa Falls, Wisconsin, moved on to the C90, a further improvement in the Y-MP series. With only 25 Cray-2s sold, management decided that the Cray-3 should be put on "low priority" development. In November 1988, the Colorado Springs lab was spun off as Cray Computer Corporation (CCC), with CRI retaining 10% of the new company's stock and providing an $85 million promissory note to fund development. Cray himself was not a shareholder in the new company, and worked under contract. As CRI retained the lease on the original building, the new company had to move once again, introducing further delays. By 1991, development was behind schedule. Development slowed even more when Lawrence Livermore National Laboratory cancelled its order for the first machine, in favor of the C90. Several executives, including the CEO, left the company. The company then announced they would be looking for a customer that needed a smaller version of the machine, with four to eight processors. The first (and only) production model (serial number S5, named Graywolf) was loaned to NCAR as a demonstration system in May 1993. NCAR's version was configured with 4 processors and a 128 MWord (64-bit words, 1 GB) common memory. In service, the static RAM proved to be problematic. It was also discovered that the square root code contained a bug that resulted in 1 in 60 million calculations being wrong. Additionally, one of the four CPUs was not running reliably. CCC declared bankruptcy in March 1995, after spending about $300 million of financing. NCAR's machine was officially decommissioned the next day. Seven system cabinets, or "tanks", serial numbers S1 to S7, were built for Cray-3 machines. Most were for smaller two-CPU machines. Three of the smaller tanks were used on the Cray-4 project, essentially a Cray-3 with 64 faster CPUs running at 1 ns (1 GHz) and packed into an even smaller space. Another was used for the Cray-3/SSS project. The failure of the Cray-3 was in large part due to the changing political and technical