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slk 900-a vs. 900-u and fanbus

Discussion in 'AMD Overclocking' started by Kabome, Aug 31, 2003.

  1. Kabome

    Kabome Guest

    for my next system i was planning on purchasing a barton 2500+ xp and an
    epox 8rda+ rev 2.0 board for overclocking. i'm sticking with air cooling for
    now with this machine and was planning on getting the slk-900u, but i've
    noticed the "a" version of this sink recently released. i was wondering if
    there is any real difference between the two in terms of cooling
    performance, as i'd prefer the "a" model for the socket lugs as i wouldn't
    have to remove my mobo in order to re-seat the sink.

    as well, i was going to get the 92mm vantec tornado, to cool the sink but i
    wanted to use a rheobus to control it if i ever wanted to turn down the
    noise level. i was looking at the vantec nexus 201 model
    (http://www.vantecusa.com/nxp201.html) but looking at the max current draw
    for the tornado it's rated at 1 a, the max current that the site says the
    bus can handle is 1.5 a, i was hoping to put all my case fans on the same
    bus, but most case fans are rated around .15 to .2 amps a piece so this
    would quickly fill the remaining current draw left on the bus, i was
    wondering if the bus could be damaged by drawing to much current over it.
    Kabome, Aug 31, 2003
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  2. Kabome

    Brian Guest

    The U stands for Universal - meaning it comes with plates that are to be
    installed to allow the heatsink to fit on an AMD or an INTEL processor.

    The SLK 900 is also quite large - have you checked on thermals site to make
    sure it will fit ok on the mobo? I just ordered an SLK 800 and smart fan 2
    (80mm) from newegg myself. It seems your using AMD since your posting here -
    I would buy the cheaper of the two, 900A or 900U
    Brian, Sep 1, 2003
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  3. If your mobo has boltholes you should use them for this heatsink. It's
    simply too large to depend on socket lugs. The thermalright website will
    say if it will fit on your mobo. Also, you don't need a 50db 92mm case fan
    to cool this. a 28db 92mm will still move 60cfm and be fairly quiet. I
    would not plug it into the motherboard either, use a powersupply connector.

    Roger Squires, Sep 1, 2003
  4. Kabome

    LBJGH Guest

    The 900a is configured differently than the 900u. The fins on the 900a run
    the same way as the 800a and help the HS clear capacitors which was an issue
    on the 900u and some motherboards.

    Have a look at this review:


    My SLK800a keeps my 1700+ @ 2520mhz under 55c with a 36cfm sunon fan
    LBJGH, Sep 1, 2003
  5. Kabome

    Kabome Guest

    Yea, i know not to plug it into a mobo header. I also know i don't NEED a
    vantec tornado to cool it with, but i don't mind the noise when i need the
    cooling but i'd like the option to turn it down, i was wondering what buses
    people have used to control a large current draw fan like the tornado.
    Kabome, Sep 1, 2003
  6. Kabome

    Kabome Guest

    Well, my local cooling vendor sells both the 900a and 900u for the same
    price, as well, i've checked and the 900u does fit on the epox 8rda+, so,
    for me i can go either way, i was just wondering if either had a performance
    advantage over the other.

    A website review comparing the two would be great, i've been looking but
    haven't been able to find one.
    Kabome, Sep 1, 2003
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