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21 votes
5 answers
8k views

The Cray 1 used 115 kW of power. How was that much grid power physically delivered to the unit?

We are talking power plant levels of current to power the the thing. Did it just have 2 inch lugs?
R Gi's user avatar
  • 327
37 votes
6 answers
9k views

Why does the Cray 2 use 400 Hz power, and why generate that from motors?

This Cray sales brochure details on page 4 that the Cray-2 uses 400 Hz power, and generates this from motors. 400 Hz power from motor generators I'm not sure that in 1986, the state of the art ...
Omar and Lorraine's user avatar