4 ms·
It actually has a 150kW 208v 3-phase generator set that provides power to the power distribution cabinet which then uses variacs to transform the voltage to 5v.
by quickthrowman 6y ago
It actually has a 150kW 208v 3-phase generator set that provides power to the power distribution cabinet which then uses variacs to transform the voltage to 5v. The genset has a theoretical current output of 415A, pretty serious power!
https://www.edn.com/cray-1-super-computer-the-power-supply/ https://www.edn.com/cray-1-super-computer-the-power-supply/
- fiddlerwoaroof 6y agoJust plug it in at a supercharger.
- EarthLaunch 6y agoLooks like most superchargers supply exactly 150kW (newer ones supplying 250kW) [1]. 1: https://en.wikipedia.org/wiki/Tesla_Supercharger https://en.wikipedia.org/wiki/Tesla_Supercharger
- fiddlerwoaroof 6y agoYeah, that was the joke :) It helped put the power draw in perspective for me.
- EarthLaunch 6y agoFor me too, thanks :) Interesting given the decades lag.
- AnimalMuppet 6y agoSounds like a good thing to not touch by accident...
- CrayBoy 6y agoIt's not Cray if the bowels; don't touch. Merry Christmas. May the light shine upon yous. < 3
- anonymousiam 6y agoOhm's Law says 5.2V @ 770A is only 4.004kW. With one of these on each of the three phases, that's a total of 12,012kW. So where did the rest of the power go, into cooling? Perhaps it was a linear power supply instead of a switcher? That would make for lots of inefficiency.
- kens 6y agoThe Cray-1 has 36 power supplies: 20 that supply -5.2 volts, and 16 that supply -2.0 volts. (The weird negative voltages are for ECL, the fast logic family used in the Cray.) The bench around the Cray holds the power supplies. Interestingly, the power supplies themselves are unregulated; regulation is done by the motor-generator unit.