16 Oct
2007
16 Oct
'07
2:10 p.m.
On 16 Oct 2007 at 21:49, Jules Richardson wrote:
Was that rating for the entire system, or just the CPU
& I/O (no drives etc.)?
Sounds like the usual 40 HP setup for the CPU+I/O. Larger systems
with more I/O sometimes added a 20 HP MG. The beautiful things about
these was that you didn't need much in the way of filtering (400Hz 3-
phase gives a ripple frequency of 2400 Hz) or regulation (usually
accomplished with a panel meter and a 3-phase variac.
Of course, that's not taking into account the need for HVAC and
chilled water supply... CDC Sunnyvale Ops had a big cooling tower --
sent up a plume that you could see from a long distance away when the
smog wasn't too thick.
Cheers,
Chuck