Discuss (6) -
Posted at 8:00 PM on Wednesday 07/28/10 by
Ben
Hotness UNHOT
MWave has the Thermalright TR-FDB-12-2000 2000RPM 80CFM Case Fan for $11 + $0 shipping = $11 shipped with free "M" Club membership. Uses 7v of power and fan speed can be set to 1000RPM, 1300RPM, 1600RPM, or 2000RPM. [Compare]
  • 1
    Asandbag - Posted 11:12 pm PDT 07/28/10 (16 Posts)  Report Spam

    Since when did we start using volts to measure power?

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    me2 - Posted 6:39 am PDT 07/29/10 (766 Posts)  Report Spam

    More to the point, where am I going to get 7V without adding a fan controller?

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  • 3
    dave_c - Posted 8:09 am PDT 07/29/10 (16755 Posts)  Report Spam

    Claims it has 3 pin (motherbard) connector, claiming it'll run at 7V means you can expect the claimed lower RPM while some fans don't scale well, and you can achieve 7V by swapping a couple pins in an inexpensive 4 pin molex to 3 pin fan adapter cable.

    Such adapter cables can be found many place, around $2 delivered at http://www.svc.com. See the following example though they have more models to choose from.

    http://www.svc.com/3pinto4pinad1.html

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  • 4
    Casecutter - Posted 8:29 am PDT 07/29/10 (5011 Posts)  Report Spam

    Well if you aren't using a fan controller this might not be a good fan for most folks at 38dBa, while yes 80.5 CFM!

    Not sure what Ben means by can be "set"... there's no set-able or adjustment on this? They have those "speeds" as individual models, but this is basically a normal case fan wound for 2000rpm. I think the 7v is just what the lowest recommend input and probably won't translate into an actual 1000Rpm, by rights that would be more like 6v.
    http://www.thermalright.com/neapage/product_page/fan/product_tr_fdb_fan.html

    At Egg it's $13 shipped, so not a huge savings.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16835109027

    Most often this simple adapter would cut your voltage, but I think I'd just put this cost into picking a fan that better suites my CFM/dBa requirements.
    http://www.newegg.com/Product/Product.aspx?Item=N82E16811996016

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  • 5
    krusty - Posted 9:53 am PDT 07/29/10 (1110 Posts)  Report Spam

    One little tidbit of info they neglected to add. It's a 120mm fan in case you can't tell by looking(I couldn't).

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    dave_c - Posted 10:55 am PDT 07/29/10 (16755 Posts)  Report Spam

    Sony FDB bearing, pretty quiet but won't have good life mounted horizontally.


    You can also bring the RPM down to a low level by soldering a 1W ~68 Ohm power resistor in series on the positive lead, then run it straight from a non-controlled 12V motherboard fan header or a straight/standard adapter if needed.

    However somewhat counter-intuitively the higher the default RPM of the fan (@12V), the lower the ohmage of the resistor you need. Fans that start near silent can use a 120 Ohm, but those quite fast need as low as 47 Ohm or the super-tornado types even lower.

    I ended up doing something similar with the 700W OCZ PSU I bought recently, for whatever reason it appeared to be the older revision that had the fan stuck in a far higher RPM range than it needed. That voids the warranty but in the combo special + rebate deal I got in on it was dirt cheap, cheap enough the value of the time and postage to send it back almost equalled what I paid.

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