Mark Sims skrev:
The power dissipated in a modern CPU chip (watts per sq cm) far exceeds that of a cooking hotplate. There are some videos on YouTube showing CPU's literally exploding when they loose cooling for just a short time. ECL is a rather chilly iceberg in comparison...
The Cray-1, where the core is ECL only, uses the board ground plane to connect out to the mountings which is infact cooling walls called cold bar. They had problems to manufacture those in aluminium to hold the circulating freon properly.
The power was fed to the supplies under the seats in 12-phase 400 Hz AC (12 phases after transformer, 3 phases from power-converter) such that after rectifying only very little filtering is needed to kill the ripple. While the hungriest modules was consuming 65 W, density wise a modern CPU puts it to shame.
The Cray-3 on the other hand... the modules was just bathing naked into cooling fluid.
Cheers, Magnus _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
