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Thread: Passive Cooled Radeon

  1. #1
    Senior Member Stringent's Avatar
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    Passive Cooled Radeon

    Something you don't see everyday on the current high end GPU. A passive cooled heatsink. Must be in competition with NVIDIA

    http://www.ixbt.com/video2/images/sa...o-ue-front.jpg

    http://www.ixbt.com/video2/images/sa...ro-ue-back.jpg

    That must also take up the next PCI slot being that big. I don't think I'd even trust it in my system, I'd prefer a fan!

  2. #2
    But Why's It So Cold?. jon bda's Avatar
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  3. #3
    Batman
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    Yeah they dont allow remote linking by the looks of it, anyway its nice to see a passive cooled card although one less fan is always nice, im sure it wont cool as good as a active cooled card hence a bit of a drawback for overclockers....

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    Hexus.Jet TeePee's Avatar
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    Try this one: http://www.ixbt.com/video2/r9800pro-ue.shtml

    It's an interesting read too...

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    Junior Senior Member Aaron's Avatar
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    Looks like it's just a Zalman heatpipe with a different badge stuck on it.

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    Senior Member Stringent's Avatar
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    Originally posted by TeePee
    Try this one: http://www.ixbt.com/video2/r9800pro-ue.shtml

    It's an interesting read too...
    Cheers TeePee, should have put link to original story ...

    Here is the English version

    http://www.digit-life.com/articles2/...800pro-ue.html

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    Lovely zalman What such wonderful products they make. I have a the heatpipe currently wrapped around my 9700 pro and its running fine with absolutely no case fans, just the cpu fan and psu. The surface area is huge on those things, Id be surprised to ever see one crapping out.

  8. #8
    Wats ur tale mothergoose?
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    Its actually the r9800pro ultimate edition, chrome cooling and blah blah.
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    Senior Member SilentDeath's Avatar
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    tis nice, but tbh id prefer a normla fan (must b quiet though!) or watercooling which im getting next (silver waterblocks ). currently i have a vantec iceberq strapped to it as i sold my zalman yesterday (after 4 months). tbh the zalman is just TOOOOO big, if there was ANY kind of fan (even like in the tt giant2) the whole back half wouldnt be needed. i managed a clock of 375core on my 9700NONpro with this, thats +100mhz! (i had a 15cfm 80mm silent fan resting on the back). also it does get v hot after playing games for ages with no airflow!

    also with the zalman one, there is almost no space for ramsinks, they need to be less than 10mm³ for the front ones, each and 10mm²x4mm high
    Last edited by SilentDeath; 09-09-2003 at 05:18 PM.

  10. #10
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    i can't see any disadvantages other then size of a passive card all my graphics cards except Ti4200 have been passive and run fine even overclocked. i love zalman

  11. #11
    Senior Member SilentDeath's Avatar
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    yea they clock well with it, but really for any card later than ti4400 u need some fan on it, even if its only pushing 3cfm, or it will get hot after a few hours of intensive gaming.

    i relised that the amount of money i spent on passive heatsinks and quiet cooling, could acctually afford me watercooling, so now im selling the zalman, vantec and slk800, building my own waterblocks (out of silver! ), 2nd hand pump, and going to find on aold frigde or freezer to chill the water.

  12. #12
    Wats ur tale mothergoose?
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    Why use silver? Copper is cheaper and a better conductor.
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    Originally posted by Korky
    Why use silver? Copper is cheaper and a better conductor.
    Actually silver can be a better conductor:

    Thermal Properties of Materials
    Thermal Conductivity, W/cm-K
    Metals
    Aluminum 2.165
    Beryllium 1.772
    Beryllium-copper 1.063
    Brass 70% copper, 30% zinc 1.220
    Copper 3.937
    Gold 2.913
    Iron .669
    Lead .343
    Magnesium 1.575
    Molybdenum 1.299
    Monel .197
    Nickel .906
    Platinum .734
    Silver 4.173
    Stainless Steel-321 .146
    Stainless Steel-410 .240
    Steel, low carbon .669
    Tin .630
    Titanium .157
    Tungsten 1.969
    Zinc 1.024

    And apparently a Silver/Copper alloy might be even better.

    Edit: oooh, actually, apparently diamond is the best at 25(!!)W/cm-K, but expensive for now though until those diamond making machines start chucking out big enough quantities

    Sure would make for a pretty heat-sink though
    Last edited by Stoo; 09-09-2003 at 06:16 PM.
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  14. #14
    Senior Member SilentDeath's Avatar
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    are u sure those numebrs are right???

    alu = 2.1, copper = 4.05, silver = 4.25, diamond sheet = 6.5 iirc

    reson i am using silver is beacuse my dad has access to loadsa metal at work, one day last week he just came home with 2 peices of silver @ 97% pure, which he melted down and compressed into circles under 10 tonnes. copper (if i was to buy it) would cost more, probably £20 for each waterblock. and if my dad got copper from work, it would be in powdered form melted and compressed, but thats not as good as this would be porous? - im not sure what he ment.
    btw the silver was solid b4 melted, not powder.

    the waterblock seems like it will be very simple - 2 copper elbows with the bottoms cut off soldered to the silver base + a clip of some kind to hold it on. but it shouldnt matter, as im getting a 1200l/h pump and a fridge / freezer to chill the water

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    Well, it was a direct quote from one of those science sites, so umm yeah.
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