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Corsair SP 120 Fan Speed?

post #1 of 14
Thread Starter 
I have the fans that come with the H100i. If I plug them into the motherboard, they run at full speed no matter what I set in the BIOS under the fan settings. Are these fans designed to only run at full speed if they are not connected to the H100i block?
Cheers.
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post #2 of 14
why you dont use corsair link with H100i connected??

http://www.corsair.com/us/media/cms/drivers/CorsairLINK2_Installer_v2.3.4816.exe

but in some cases, Corsair Link Software/Firmware cuases problems

what if you change those SP120 for something with PWM?
Edited by PontiacGTX - 3/26/13 at 10:42am
post #3 of 14
Your motherboard's CPU headers likely only can control fan speeds with PWM. This is the case with my board also. You have a few options: you can either use the low voltage adapter to make them run ~7W; you can plug the SP120s into another header and use a quieter fan to substitute into your CPU fan header (make sure you correctly configure your SP120 fan headers correctly so they spin up relative to temps); or you can get PWM fans.
post #4 of 14
Thread Starter 
Quote:
Originally Posted by sakerfalcon View Post

Your motherboard's CPU headers likely only can control fan speeds with PWM. This is the case with my board also. You have a few options: you can either use the low voltage adapter to make them run ~7W; you can plug the SP120s into another header and use a quieter fan to substitute into your CPU fan header (make sure you correctly configure your SP120 fan headers correctly so they spin up relative to temps); or you can get PWM fans.

What about a fan controllor with manual dials?

Cheers.

Edit: I don't have a low voltage adaptor.
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post #5 of 14
SP120s work with a fan controller, i have 4 hooked up to my Lamptron FC-6 and it controls them just fine thumb.gif
post #6 of 14
Thread Starter 
Quote:
Originally Posted by rjmana View Post

SP120s work with a fan controller, i have 4 hooked up to my Lamptron FC-6 and it controls them just fine thumb.gif

Sounds cool!
There are issues with whinning and rattling with the H100i. Is this due to the fan in general or the internals of the PCB in the block itself?
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X79-GCN
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post #7 of 14
Quote:
Originally Posted by BradleyW View Post

What about a fan controllor with manual dials?

Cheers.

Edit: I don't have a low voltage adaptor.

Fan controllers work too. Each SP120 should come with a low voltage adapter. They are very short (2 inches?) and basically shrink-wrapped. It should be in the little baggie that comes with your screws.


Edited by sakerfalcon - 3/26/13 at 1:04pm
post #8 of 14
Thread Starter 
Quote:
Originally Posted by sakerfalcon View Post

Fan controllers work too. Each SP120 should come with a low voltage adapter. They are very short (2 inches?) and basically shrink-wrapped. It should be in the little baggie that comes with your screws.

These fans came with the h100i, sorry if I did not point this out.
X79-GCN
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X79-GCN
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post #9 of 14
Quote:
Originally Posted by BradleyW View Post

I have the fans that come with the H100i. If I plug them into the motherboard, they run at full speed no matter what I set in the BIOS under the fan settings. Are these fans designed to only run at full speed if they are not connected to the H100i block?
Cheers.

Of course.

Why else do you think the H100i has fan cables with it? It controls the fan speed via PWM. You can connect them to the motherboard and then set your own fan profiles in your motherboard's fan control program. The H100i does a pretty good job of setting the fan speed, and the CorsairLink software gives you pretty good control over the fans (better than ASUS FAN Xpert, that's for sure).

I have no issues at all with rattling or buzzing or any other odd noises with the stock H100i fans, which, by the way - are better than SP120 off the shelf fans. The SP120 High Performance editions are 2350 RPM max, the ones with the H100i are 2500 RPM max and have the same fan blade profile.

Greg

p.s. Some motherboards (like my P9X79 WS) have a jumper on them that MUST be set if you use 4-pin PWM fans attached to the CHA_FAN1 through CHA_FAN4 connectors if you expect to control their speed properly. The board comes by default configured for 3-pin fans, which are voltage controlled and not PWM controlled.
Edited by hammong - 3/26/13 at 1:54pm
post #10 of 14
Thread Starter 
Quote:
Originally Posted by hammong View Post

Of course. Why do you think the H100i has fan cables with it? It controls the fan speed via PWM. If you connect them to the motherboard, you'll need to set your own fan profiles in your motherboard's fan control program.

Greg
Oops. Really? So the wire that plugs into the block also has the ability to connect to the motherboard? This, and the usb cable is all it came with. Cheets for the help so far.
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X79-GCN
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