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4-Pin to 3-Pin Fan

post #1 of 5
Thread Starter 
My Sunbeam Rheobus has 3-Pin fan connections. My x1950XTX has a 4-pin fan. I wanted to use my fan controller to be able to dial down the noise of the GPU, but I'm not sure that a 3-pin wouldn't either short it out, or not provide enough juice. So, anyone have any expertise as to what I should do about that?

Also, just to make this a double thread, in the x1950XTX supposed to be like super hot? I haven't monitored temps yet, but after gaming, it is hot enough to burn my hand. Is that just the nature of this particular card?
Edited by pow3rtr1p - 5/27/08 at 11:44pm
    
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post #2 of 5
I've got an X1900XT, and I've only got a 3-pin connector, but it's not the standard fan connection. I think the extra wire is just for RPM sensing, but I'd double-check that somehow (I have no idea how, to be quite honest) just to make sure. I'd also make sure the fan is rated for +12v, some GPU fans are only +5v I believe.

And the X1900/X1950 series are some pretty toasty cards. Even with my ICEQ 3 cooler using the stock CCC fan profile my card routinely hit 83c in a fairly cool room. I switched to ATITool and set a custom fan profile that keeps my GPU below 65c now however, and it doesn't make too much noise. I'd strongly suggest considering an aftermarket cooler if you try setting some better fan settings with ATITool or ATI Tray Tool and can't stand the noise the stock cooler makes. The Arctic Cooling Accelero X2 looked pretty good back when I was shopping for my GPU two years ago, but there are likely a few newer and better choices on the market at this point. I do like the look of the Thermalright V2, since it allows you to add your own fan, a feature I've come to love.
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post #3 of 5
usually the 4th pin on a fan connection is the rpm contoller (pwm). the connector should be notched and should still fit the three pin head notching - as long as they are both 12v devices. the third pin is usually rpm monitoring, leaving 1 and 2 for power.
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post #4 of 5
if your video card has a 4 pin fan, then it can control the fan itself... normally you can set the fan's upper and lower limits in the control panel for your video card...


i know for a fact RivaTuner and even nTune can do this... don't know what the specifics are for the AMD cards are...
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post #5 of 5
Thread Starter 
Well, since I have an unused knob on my Rheobus, I was wanting to use that, and with all of my fans turned down, my computer is nearly inaudible. Then, I can crank everything and it's a bit louder, but still bearable, and nothing will fry.

Thanks for all of the responses.
    
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