Author: Tom Kerrigan
Date: 13:28:41 02/13/00
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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 If it takes the temp down to -40, then how is this temperature never reached? >>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. Only a few days ago you didn't even realize that temperature affected switching times. Now you are willing to bet about how much they are affected? I think this is suspect. Do you know for a fact that they are increasing Vcc? Maybe they aren't. I'd like to see a quote from AMD or Kryotech. -Tom
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