Sander probably knows...

[Machupo]

Hey Sander (or anyone else who has the 411, not 911, 666, or 69... but 411),

how can i get my CPU to -40 or -50°C? should i use cascaded peltiers w/ a phase change coolant system?

just curious, cause something's up w/ my 1/3 divider on my Athy, just doesn't work or something... so i'd like to try and get my cache chips to 500mhz... (they're running at 413 right now w/ air cooling -- i only have a waterblock on the core.... that's gonna change within the week)

thanks!!!

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Shameless plug:
Athlon 500@825 (3.75 X 220), 1/2 cache, 1.85V

[#Rotor]

yes use both, peltier cooling for the primary, and phase change evaporation to keep them peltiers happy.........

i don't have a 411 though

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http://24.68.81.76/htmls/my_pc/index.html

[This message has been edited by #Rotor (edited 04-20-2000).]

[Machupo]

hehe... how times change... now i'm just going for a 98% water / 2% redline primary coolant loop w/ a peltier cooled reservoir (nice stack of heatsinks + fans on them peltiers )

i guess if i have a good month of no school (at least two years from now, cause once i start my thesis, no sleep )

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Shameless plug:
Athlon 500@864mhz (4.00 X 216), 2/5 cache, 1.90V

[NiteOwl]

the theoritical limit for DT of a single peltier is around 60-70c. Cascading peliters are for designs where DT needs to be much greater (ie. over a 100 C DT), but it is much more inefficient than a single peltier.

[KeBoMaN]

My experiences with Peltiers show me that they usually get around a 40c DT...

Kebo

[NiteOwl]

yup. 60-70 c is the theoritical limit. It also depends on the temperature of the heat exchanger, heat sink resistivity and other factors.