Author: Robert Hyatt
Date: 13:39:22 02/13/00
Go up one level in this thread
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 > > yes you might get one of those too. :) > >>> >>>Regardless of the actual temperature, it's obviously going to be much cooler >>>than a normal computer. And that makes switching times go down. And that's what >>>matters. >> >>I'd bet that the difference is in picoseconds, not nanoseconds, which doesn't >>help a whole lot. What matters is that they can up Vcc without burning the >>thing up. >> >> >> >> >>> >>>-Tom
This page took 0 seconds to execute
Last modified: Thu, 15 Apr 21 08:11:13 -0700
Current Computer Chess Club Forums at Talkchess. This site by Sean Mintz.