Author: Dave Gomboc
Date: 00:14:46 02/14/00
Go up one level in this thread
On February 13, 2000 at 13:55:06, Albert Silver wrote: >On February 13, 2000 at 12:57:14, Andrew Carey wrote: > >>On February 13, 2000 at 11:05:08, Robert Hyatt wrote: >> >>>On February 13, 2000 at 03:15:12, Tom Kerrigan wrote: >>> >>>>On February 12, 2000 at 19:53:12, Robert Hyatt wrote: >>>> >>>>>I don't believe they are doing this. They are applying -40c to the cpu, but >>>>>the heat it is producing prevents the cpu from getting to -40 during operation, >>>>>I'd bet. I'd bet the real cpu temp is well over 0c, if it has a temp >>>>>thermocouple as my xeons. do. My xeons run at about 106F under heavy load, >>>>>for a reference. >>>> >>>>Possibly. I wouldn't know. If they aren't getting the CPU down to -40, then I >>>>don't see why they would be taking such precautions against condensation. >>>>(Somebody else posted about this yesterday.) >>> >>> >>> >>>quite simply. The "cold box" attached to the cpu is removing heat by spraying >>>freon into a small chamber where it evaporates and takes the temp down to about >>>-40c. The cpu is providing enough heat that this temperature is never reached, >>>which is the point of the device. If you shut the cpu off, you have a block of >>>aluminum that _is_ suddenly at -40, so that you get first ice, then water. They >>>turn on a heater device to replace the CPU's heat output, and get everything >>>above the condensation point, before the thing gets shut off. Their cooling is >>>not anything remarkable at all. The main problem they had to solve is that a >>>cpu that is idle (halted in an O/S wait loop) produces almost zero heat, so they >>>have to avoid turning the CPU and associated motherboard area into an icecicle. >>> >> >>icicle > >This comment warms my heart. Bruce would be prowd. :-))) > > Albert Silver Proud! And I noticed that Bruce spells rumour without the second u. How tacky. ;-) ;-) Dave
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