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OT: Replacement CPU fan?

Discussion in 'Electronic Design' started by Terry Pinnell, Nov 27, 2005.

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  1. My MESH Athlon 1800 PC has a CPU fan and it badly needs replacing.
    It's a common 3-pin 12V, 60mm type. Its depth (which BTW never seems
    to be included in specs) is about 12mm. That's considerably thinner
    than 60mm case fans, and the screw holes are much smaller diameter

    After much googling I've so far still not found a replacement UK
    source. Can anyone help please?

    Neither my nerves nor skills are up to replacing the *heat sink*. I
    want to replace only the fan.
  2. Ray L. Volts

    Ray L. Volts Guest

    Fan/sink combinations are pretty cheap lately. To get the fan size you
    want, you may have to buy a new combo and use the fan from it. Dunno bout
    UK distributors, but Cofan offers a fan by itself that matches your
  3. That looks perfect, thanks. Now, if only I could find a UK equivalent!
  4. Cyrus®

    Cyrus® Guest

  5. Thanks, looks good. But I'll have to wait until I can 'phone tomorrow,
    as the spec doesn't confirm it's a 3-pin, nor show depth (or a decent
    image enlargement so I can take a guess).
  6. Cyrus®

    Cyrus® Guest

    Look this site too, Lots of PC fans with heatsink for your need.

    Good Luck
  7. James Sweet

    James Sweet Guest

    Just about any 60mm fan will work so long as there's clearance for it,
    any computer shop can help you out.

    Replacing the heatsink is pretty easy too, most stores that will sell
    you one locally will probably install it for a nominal fee too, or just
    find the nearest tech savvy teenager.
  8. Arrrgh!!!! The whole *UNIT*, fan+heatsink, is about GBP 10 in a mail-order
    computer shop!!!!

    *Just Order* and you will have it the next day or the day after.

    Rip the fan off that if you must, or better just replace the whole thing
    (remember to buy heat sink compound - whatever is under there have dried out
    buy now). It's not a big deal, my 15-year old can do it.
  9. "Frithiof Andreas Jensen"
    Not safely in my PC, I bet he couldn't. Clearance is very tight. But
    that aside, why incur *any* risk by replacing a perfectly satisfactory
  10. What risk? BTW, you start to behave like Jim Thompson, who also posts
    off-topic stuff in SED, whenever his zipper jams or his mouse cable gets

    Now, get out and buy a new fan ;)
  11. SioL

    SioL Guest

    With AthlonXP, the CPU chip die was practically exposed and being just a little bit
    clumsy with the heatsink can chip the edges and the cpu is toast. It happened quite
    a lot. I was scared to handle it. Thanks God the new opterons/athlon64/semprons
    have metal case over the die.

    I'd just scrap the old fan and mount the normal 80mm over it somehow. Usually there
    are some fixing points available in the case, be creative with the old junk you have lying
    in your drawers. This way it'll work better and more silent. Those small fans are noisy
    and not that efficient.
  12. Though 'risk', is fairly low, many units that used the thermal transfer
    'tape' assemblies, suffer from becoming permanently bonded to the chip. I
    have seen a number of people have severe problems seperating these from
    the processor (ranging from damaging the socket, trying to prise the
    heatsink off, to actually breaking the CPU...).
    Personally, I'd suggest that Terry measures the fan, and orders a heatsink
    assembly, that has the same size fan, and just swaps this. Seperate fans
    _are_ available from electronic suppliers, like Farmell, RS, and some from
    Maplins, but in general, often cost more than the assemblies (the key is
    how many of the latter are sold).

    Best Wishes
  13. If I felt there was any risk, I'd just pop into one of dozens of small
    local computer shops where they'd do the work for cheap, probably
    while I waited.

    The fans eventually wear to the point where they start making a lot of
    noise, and then eventually seize. That's why a lot of MOMBOs have fan
    RPM monitoring hardware and firmware. The former situation is what I
    think "badly needs replacing" implies.
  14. Yep, thanks, that's exactly what I'm trying to do.

    It's surprising how elusive a simple (UK) replacement is proving to be
    though. Maplin looked hopeful but a phone call established they no
    longer stock any suitable 60mm types. CPC are another possibility, but
    specs (catalog or online) are never conclusive enough for a confident

    Meanwhile, right now you'd never know the fan had died. After
    re-oiling with 3-in-One, and a bit of Sellotape to seal it (the
    original label was losing its adhesiveness), it now seems to be
    running OK.

    After recommendations in alt.comp.hardware, I've now installed a
    monitoring program called MBM 5. It reports my CPU at a steady 50°C.
    That sounds a bit warm, but I assume it's OK. (CPU = AMD Athlon
    XP1800+ on ASUS A7A266-E m/b) The case is at 31°C. And the fan is
    typically at about 4750 rpm. I'd prefer it to be slower (quieter). I
    hope that will be the result if I eventually succeed in *finding* a
    thicker (25mm instead of 12mm) 60mm replacement, maintaining similar
    air displacement but at lower revs.
  15. Agreed, thanks. As per earlier posts, that's what I'm doing. (60mm,
    not 80mm.)

    Despite the gung-ho posts up thread, no way would I try shifting it
    myself. Can't even get my fingers to one of the levers. Nor would I
    contemplate the hassle, expense and stress of cable
    disconnection/reconnection, getting the case to a computer shop, and
    paying them to try removing and replacing the integral unit. Even if
    *they* felt the risk worthwhile, I've now read enough tales of woe
    that I wouldn't be comfortable. All that for a fan costing probably
    5-10 UKP (9-18 USD), that's going to take me 5 mins to replace in
    situ? No, it's just a matter of finding one!
  16. Yeah - to clumsy people - the whip teaches ;-).
    Nothing ventured, nothing Gained.

    Besides, it is normally not a finger job, instead there should be a slot
    where one inserts a flat screwdriver to unclip the "locking spring" that
    holds the assembly. (The only problem is that it might be glued to the chip
    with some of the 3M thermal strips).
    Sure - and you spend what, GBP 250???, in your own time doing that (unless
    it is at work, of course ;-)
  17. clifto

    clifto Guest

    If you want to replace the heat sink, pull the motherboard first.

    Anyone who tells me it's not necessary gets to troubleshoot an A7V that
    worked perfectly before the heatsink was replaced, and went to doorstop
    mode afterward. (That's what I get for listening to people telling me
    it was safe to do this.)
  18. Rich Grise

    Rich Grise Guest

    Well, first, I don't recommend that you "rip" anything off anything, even
    if you're salvaging - it will unclamp, or as FAJ says, just buy the whole
    assembly. But _do_ unplug the old fan! And note the polarity! Then, be
    sure to gently clean the old heat sink stuff off the top of the chip with
    isopropyl alcohol. Gently, as in "with a Q-tip dipped in the IPA". And
    don't be afraid to be generous with the new heatsink goo (I like DC-340) -
    the spring holder is designed to apply the exact right amount of pressure
    to squeeze the goo out from between to the right thickness, and the goo
    that squeezes out around the edges is just spare. But it avoids voids,
    sorry for the alliteration. :)

  19. Kris Shaw

    Kris Shaw Guest


    I would try Maplin if you have one nearby. Otherwise, I have also
    bought from Midland Computers:

  20. Thanks Kris. As mentioned up-thread, Maplin looked hopeful but a phone
    call established they no longer stock any suitable 60mm types. But the
    low-priced fan at
    might be OK, perhaps with the plug adapter. The only minor snag might
    be the larger hole diameter, but I imagine that springy washers would
    ensure a snug fit with existing machine screws. (Don't want to have to
    re-drill holes in the heatsink.)
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