Author: Robert Hyatt
Date: 10:55:27 02/14/00
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On February 14, 2000 at 12:53:27, Tom Kerrigan wrote: >On February 14, 2000 at 08:55:42, Robert Hyatt wrote: > >>Sorry.. but if you go to the US Patent office, the _only_ patents that were >>applied for during the development of the _original_ cray 1 were cooling >>related. 1970's era ECL logic produced a world of heat. > >And I'm sure that Cray uses some sort of cooling. But maybe they just use >"enough" cooling. Putting Kryotech-like hardware on all of their processors may >be more work than it's worth to them. Tom, please. Cray makes the fastest machines on the face of this planet. These machines sell for up to 60 million dollars. Do you _really_ think that _anything_ is "not worth the trouble to them?" They do _everything_ possible to drive the speeds faster. They spent a bunch of money driving a clock cycle from 4.1 to 4.0 nanoseconds in one machine. > >>And yes, the condensation problem is serious, and the Kryotech guys spent a lot >>of time solving the problems. They had no choice. And as I said, I can't say >>anything about what they got from AMD, but I know exactly what they were doing >>with Digital as a friend in hardware development up there was involved in the >>kryotech alpha project. They didn't jump thru hoops for the kryo guys at all >>at Digital. > >From what I've read, AMD is fully supporting the Kryotech machine, to the point >of providing a warranty for the processor. This tells me that they are pretty >serious about stability; so they probably wouldn't be sending Kryotech >processors that just barely work at 750MHz. I won't comment on the situation >with Digital because I don't know anything about it. > >-Tom DEC did the same thing... although I didn't ask about the financial details (I am sure Kryo pays DEC more for a chip to be overclocked than others pay for a stock chip, just to cover the warranty issues). I have no idea how they sort chips nowadays. Intel obviously sorts parts into X, Y and Z clock bins, for some devices. Maybe AMD has a 750+ bin they sort parts into for the Kryo guys? who knows. However I still think that the gains are from raising the core cpu voltage more than from trying to lower the core cpu temperature...
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