RE: Mersenne: Computer speeds & factoring
> > The other (like with Peltier junction coolers) is that they > often generate > > as much heat as they dissipate. > > Often? _Always_! (Second law of thermodynamics. If you find this > is violated, get a patent immediately, you have a prototype > pertpetual-motion machine). Zing! Ya got me! :-) What I meant was that some people, with thermal sensors for their ambient case temp. besides one for their CPU, will see CPU temps drop a bit, but the ambient temp in the case will just skyrocket, and since Peltiers cool a certain amount below ambient temps, at some point even the CPU temp will be higher than before. In many cases, they have to overclock *less* than they did because other components can't take the increased speed (memory, peripherals, etc). Thus the need for even more case fans to rid the excess temps. Aaron Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: Computer speeds & factoring
Kryotech's FAQ reads: Q3: How do you prevent ice or condensation from forming around the very cold CPU? A3: We have a set of patents and extensive know-how for preventing condensation. This is the center of KryoTech's expertise arguably our most important value-add. We have been running -40C computer systems since December 1994 without condensation! I also remember reading an early press release on Kryotech a year or so ago that mentioned they surround the top of the CPU with a specially insulated cover that prevents the cold (which reaches the CPU top-cover) from being exposed to the outside air, thereby preventing condensation. Gary Diehl Aaron Blosser wrote: > > If I'm not mistaken, 2 big problems keep showing up with these > super-coolants. > > One is condensation which is really bad bad bad for your motherboard/CPU. > > The other (like with Peltier junction coolers) is that they often generate > as much heat as they dissipate. Besides adding an active cooler, you often > need to add even more case fans to get rid of the excess heat the Peltier > devices generates. > > There's the nut who is working on total immersion of his system in oil, with > an air-conditioner coil submersed as well. This would solve the problem of > condensate, but there is concern that the mineral oil will break some of the > components on the board. > > I like the idea, but instead of mineral oil, some inert water. > Unfortunately, that's not easy to come by :-) otherwise you could just dunk > the whole system into a refrigerated cooler of inert water and ramp up your > clock speeds further than otherwise possible. But for all that effort, > might as well spend more on a faster system. > > Aaron > > > -Original Message- > > From: [EMAIL PROTECTED] > > [mailto:[EMAIL PROTECTED]]On Behalf Of Gary Diehl > > Sent: Thursday, June 10, 1999 5:23 PM > > To: [EMAIL PROTECTED] > > Cc: [EMAIL PROTECTED] > > Subject: Re: Mersenne: Computer speeds & factoring > > > > > > Look at www.kryotech.com > > > > Gary Diehl > > > > [EMAIL PROTECTED] wrote: > > > > > > I have two questions/comments: > > > > > > Does anyone else remember something from a year or two back > > (actually may > > > still be a modern thing still)? This company was producing very fast > > > computers using ordinary chips and making the computer case > > into a type of > > > freezer, encasing the chip and keeping the chip very cold. > > This made the > > > computer run faster, I guess by increasing its conduction, and > > one result I > > > recall is getting a 600 MHz DEC Alpha chip to run at around 767 > > MHz? Has > > > anyone bought this kind of computer, or perhaps done some kind of home > > > modification (like all the overclocking)? > > > > > > My second question, what is a good factoring program for Win98 on a PII > > > system that allows you to enter a very large number and attempt > > to factor it, > > > thereby proving it either composite or prime? Thanks for any help. > > > > > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > > > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > > > > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
RE: Mersenne: Computer speeds & factoring
> If I'm not mistaken, 2 big problems keep showing up with these > super-coolants. > > One is condensation which is really bad bad bad for your > motherboard/CPU. I worked on a system that keeped the temperature just above the dew point. But I don't know if I could afford to put one of those in my PC box. :-) Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
RE: Mersenne: Computer speeds & factoring
If I'm not mistaken, 2 big problems keep showing up with these super-coolants. One is condensation which is really bad bad bad for your motherboard/CPU. The other (like with Peltier junction coolers) is that they often generate as much heat as they dissipate. Besides adding an active cooler, you often need to add even more case fans to get rid of the excess heat the Peltier devices generates. There's the nut who is working on total immersion of his system in oil, with an air-conditioner coil submersed as well. This would solve the problem of condensate, but there is concern that the mineral oil will break some of the components on the board. I like the idea, but instead of mineral oil, some inert water. Unfortunately, that's not easy to come by :-) otherwise you could just dunk the whole system into a refrigerated cooler of inert water and ramp up your clock speeds further than otherwise possible. But for all that effort, might as well spend more on a faster system. Aaron > -Original Message- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED]]On Behalf Of Gary Diehl > Sent: Thursday, June 10, 1999 5:23 PM > To: [EMAIL PROTECTED] > Cc: [EMAIL PROTECTED] > Subject: Re: Mersenne: Computer speeds & factoring > > > Look at www.kryotech.com > > Gary Diehl > > [EMAIL PROTECTED] wrote: > > > > I have two questions/comments: > > > > Does anyone else remember something from a year or two back > (actually may > > still be a modern thing still)? This company was producing very fast > > computers using ordinary chips and making the computer case > into a type of > > freezer, encasing the chip and keeping the chip very cold. > This made the > > computer run faster, I guess by increasing its conduction, and > one result I > > recall is getting a 600 MHz DEC Alpha chip to run at around 767 > MHz? Has > > anyone bought this kind of computer, or perhaps done some kind of home > > modification (like all the overclocking)? > > > > My second question, what is a good factoring program for Win98 on a PII > > system that allows you to enter a very large number and attempt > to factor it, > > thereby proving it either composite or prime? Thanks for any help. > > > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: Computer speeds & factoring
Look at www.kryotech.com Gary Diehl [EMAIL PROTECTED] wrote: > > I have two questions/comments: > > Does anyone else remember something from a year or two back (actually may > still be a modern thing still)? This company was producing very fast > computers using ordinary chips and making the computer case into a type of > freezer, encasing the chip and keeping the chip very cold. This made the > computer run faster, I guess by increasing its conduction, and one result I > recall is getting a 600 MHz DEC Alpha chip to run at around 767 MHz? Has > anyone bought this kind of computer, or perhaps done some kind of home > modification (like all the overclocking)? > > My second question, what is a good factoring program for Win98 on a PII > system that allows you to enter a very large number and attempt to factor it, > thereby proving it either composite or prime? Thanks for any help. > > Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Re: Mersenne: Computer speeds & factoring
[EMAIL PROTECTED] wrote: > > Does anyone else remember something from a year or two back (actually may > still be a modern thing still)? This company was producing very fast > computers using ordinary chips and making the computer case into a type of > freezer, encasing the chip and keeping the chip very cold. You must be thinking of KryoTech: http://www.kryotech.com/ -- Petri Holopainen Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
Mersenne: Computer speeds & factoring
I have two questions/comments: Does anyone else remember something from a year or two back (actually may still be a modern thing still)? This company was producing very fast computers using ordinary chips and making the computer case into a type of freezer, encasing the chip and keeping the chip very cold. This made the computer run faster, I guess by increasing its conduction, and one result I recall is getting a 600 MHz DEC Alpha chip to run at around 767 MHz? Has anyone bought this kind of computer, or perhaps done some kind of home modification (like all the overclocking)? My second question, what is a good factoring program for Win98 on a PII system that allows you to enter a very large number and attempt to factor it, thereby proving it either composite or prime? Thanks for any help. Unsubscribe & list info -- http://www.scruz.net/~luke/signup.htm
