Ex-Cray supercomputing exec on SiCortex board

John Rollwagen, the former chairman and chief executive of Cray, has joined the board of another supercomputing specialist, SiCortex, the company plans to announce Wednesday. SiCortex is building special-purpose energy-efficient processors for Linux-based compute clusters.

Rollwagen replaces Ethernet pioneer Bob Metcalfe, the company said. Rollwagen was an early colleague of Cray founder Seymour Cray and currently is a principal of Quatris Fund, an affiliate fund of St. Paul Venture Capital.

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