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Thread: Best HSF/FAN for sub-zero air cooling

  1. #1
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    Best HSF/FAN for sub-zero air cooling

    As the title says i'm intrested in the best heatsink for some -10Gr all air action. Unfortunately i have a limited choice of products in my country. Weight, noise are of no concern as i'm also looking for the highest cfm 92/120mm fans available to buy .

    All input/links will be greatly appreciated.

  2. #2
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    You can not get below air temperature with air or water. You need phase change to do so.
    For those of you about to post:

  3. #3
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    Or a TEC. But I wouldn't recommend a TEC with air.

  4. #4
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    He he .. maybe i wasn't clear enough the air temperature will be -10Gr, benching outside and winter time kind of helps

  5. #5
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    want to know what to do... I'm talking Xtreme air cooling!

    get an Electric Leaf Blower Motor And Impeller!
    were talking like +200mph winds! get industrial if possible

    i had an industral leaf blower motor... which had a 90mm exhaust, 70mm intake... the thing was BAD! ofcourse benchmarking only...

    tell me a leaf blower doesn't have any CFM
    definetly more than a vaccum in reverse!
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  6. #6
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    CrazyXP1700 i'll look into that ... heat pipe based HSF have the same performance characteristics in sub zero environements ?

  7. #7
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    i dont think it would.

    I'd assume the liquid in heatpipes freezes as easily as it evaporates. you might want to go with something like giant copper fins. perhaps a CNPS7700 by Zalman with a clothes dryer vent hose, with a high CFM 120 mm fan on the end and stick it out your window.

    you could also try getting a shop fan and just having it blow straight into your case.

  8. #8
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    i think if you can keep the heatpipes a little warm you might be ok...
    since the fluid in the heatpipes boil at a lower temperature... is it possible that it also freezes at a lower temp? might be something to look into

    also it takes a little while for it to actually freeze... so as long as your not sitting outside too long with the system off you might be ok and it will never actually freeze... run the S&M in the house or something get that heatsink nice and toasty (maybe turn the fan off until you reach close to critical temps)... and get that thermal paste burned in... then haul it outside before it can cool down and slap on your leaf blower :P

    i doubt the cpu itself will freeze with a tower type heatpipe heatsink... since the cold base isn't really going to be activly cooled... well it doesn't have fins to pull in even more cold air...
    i think a heatpipe heatsink like a SP-97 or 94 would be ideal for keeping the CPU as cool as possible... something like that where the heatpipes and fins all go down to the base...

    what cpu and heatsink are you planning on using?
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  9. #9
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    i spent a little time looking around the interweb... and i found some data saying that some heatpipes can handle -80C... and others saying 0C...

    i guess it all depends on what type of fluid is in your heatpipes... if you are using a heatpipe heatsink
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  10. #10
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    As i was recently pointed out the heatpipes contain some sort of mild refrigerent 416A/134a.

    http://www.refimax.com/products/chart.htm

    Freezing points:
    http://www.refrigerants.com/MSDS/r416A.pdf -101*C
    http://www.ineosfluor.com/Refrigerat.../Klea134a2.asp -101*C

    Winnie 3200 Zalman 7000 AlCu for indoor testing Thermalright SLK948U and Delta 80 mm EHE for the outdoor fun .. the alternative was an Thermalright XP90.This is pretty much the best method for sub zero benchin' with Winchesters if you live in a country with cold nights

    If only i could find specific XP90/120 info.

  11. #11
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    yeah the -80C one that i had found was using some sort of oil in the heatpipes... so yeah its basically the same info that you've found


    why go with delta... rip apart a leaf blower!!! lol
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  12. #12
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    Damn i don't have a leaf blower ... and in eastern europe leafs aren't so much of a concern.

    But i'm going to get these babies from the US.

    http://www.sidewindercomputers.com/sicy92detf.html
    Specifications: 92x92x38mm, 126.48 CFM @ 5400 RPM, 59.2 dBA, 16.20 watts, 1.35 amps

    http://www.sidewindercomputers.com/delffb1212eh.html
    Specifications: 120x120x38mm, -->190.00<-- CFM @ 4000 RPM, 59.0 dBA, 24.00 watts, 2.00 amps

  13. #13
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    haha... yeah... good ol USA...

    but i picked up the idea from my friend who use a leaf blower fan to cool like 6 computers in his folding farm... 6 x 3.0ghz cpu's!
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  14. #14
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    59dBA! damn you really don't value your ears do you? :p

  15. #15
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    you all are thinking wayyyy too small here.

    http://www.higherpowersupplies.com/p...HB/TE-TPC48156

    Sit your mobo on a chair about 2 feet away and witness the raw power of 19,460 CFM....as the chair tips over and your mobo blows away in the wind. Seriously though, those Deltas from Sidewinder computers are about the highest flow fans you can buy.

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