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Scythe High-Speed GT and Fan Resister...

post #1 of 9
Thread Starter 
will it work?
has anyone tried it?
any brand of resister better than others? Also where to get one...?
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M4800
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post #2 of 9
A fan controller is highly recommended for these fans. You'll want to dial in the speed/noise, and you won't be able to do that using resistors.
post #3 of 9
I assume you are talking about using a variable resistor or potentiometer to control the voltage across the fan to control speed...if so:

http://www.sidewindercomputers.com/sirh25wa.html

Those are far more expensive than what is needed for a single fan though. You could always build your own from parts at your local radio shack. To be honest though if you are planning on controlling multiple fans you should just get a good fan controller, they arent that expensive and look a lot nicer. Not to mention they are easier to use.

For example:
Anything like this
http://www.sidewindercomputers.com/sckmkamapro3.html

Hope that helps a bit.
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All Fear the TLAM
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post #4 of 9

I used this on a high speed Panaflo (.45A) for about a year with no problems, though it does get very hot. It's good up to about 6w. Comes in 5V and 7V flavors - QuietPC
Edited by gymenii - 3/17/11 at 10:41am
post #5 of 9
If you want a super-cheap solution you can hard-wire the fan to 5v or 7v off the PSU. No resistor required!
post #6 of 9
Thread Starter 
i got 2 extra resistor from the H70 package...i was thinking about using them.
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post #7 of 9
They might work, or they might melt. They aren't designed for the higher wattage fans, but w/o knowing the specs of the resistors in them it's hard to guess. Most likely they will work just fine, though.

To dial those fans in properly you'll want a fan controller. I got my Sunbeam Rheobus for $12 a couple years ago. You don't need to spend a fortune to get proper control of these beastly fans.

Getting a high-speed fan and constantly running it at a slower speed seems like a waste. You should have just purchased lower speed fans (AP-15 or AP-14) which would be more efficient at the speeds you want to run them all the time anyway. The 3000rpm+ GTs are not as quiet as the AP-15's when both are running at 1850rpms.

I have a decent assortment of high-speed Delta and Panaflo fans, and if I dial them down to be as quiet as possible they won't start up when I restart the PC. I have to crank up the voltage a tad for them to start, but then there are various undesirable noises. These are great fans for benching and it's always nice to be able to turn my case into a wind tunnel if needed, but now I'm looking at getting some AP-15's or the 2150's so I can still get very good airflow, but w/ a more desirable noise factor. I'm hoping I can get the same or better overall airflow at the same or lower volume using the 1850 or 2150 GTs compared to using the Delta/Panaflos at min voltage.

Do you know how to wire it up for 5v or 7v off a PSU molex? IMO this is a preferred method to resistors as you don't waste any power and don't add any more heat to the situation.
post #8 of 9
I just put up a quick do it yourself method

http://www.overclock.net/air-cooling...l#post12781561
post #9 of 9
sorry if it's a dumb question...wouldn't using resistors that generate heat defeat the purpose? or is it a small sacrifice for a bigger gain sort of thing?
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