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[Official] ASRock Z77E ITX Owners Club - Page 114

post #1131 of 2533
Anyone here use the built in BIOS Fan control for CPU Header...Using 2 x 120mm Cougar PWM Fans and a PWM Adapter that can power 3 fans- gets its power directly from the power supply and then there is a connector to the mobo...I get a buzzing noise- the lower the fan level the higher the noise? Perhaps I need an y splitter and just power fans from mobo directly?

Fans

http://www.newegg.com/Product/Product.aspx?Item=N82E16835553006

COUGAR CF-V12HPB Vortex Hydro-Dynamic-Bearing (Fluid) 300,000 Hours 12CM Silent Cooling Fan with Pulse Width Modulation (Black)


Connector

http://www.newegg.com/Product/Product.aspx?Item=N82E16812311002

Evercool Model EC-DF002 11.81" Supports 3 PWM Fans From Single PWM Header


MMUbw.jpg
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post #1132 of 2533
Thread Starter 
If you have a pwm fan attached to a voltage regulated header it will buzz, I know one of the headers is voltage controlled and one is PWM I am not sure which is which though. Maybe switch them to the other header and see if that works, I am not exactly sure how pwm works or anything so I cannot be sure.
 
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post #1133 of 2533
im sure the CPU is PWM controlled and the other is voltage control. asrock's design is inflexible unlike asus boards which allows ether on ether header and controls them accordingly.

PWM works by sending pulses to the fan to signal it to switch on and off. say a fan spins at 3000rpm and it requires 100 pulses to draw something close to a flat high signal in 1 sec, if you send half the pulses it becomes a 50hz signal and the fan performs at half duty @ 1500rpm which means the fan is on and off for half the time

I just got myself another asrock Z77E and a asrock FM2A75M-ITX to play around with
post #1134 of 2533
.
post #1135 of 2533
Thread Starter 
Yeah, it isnt that easy to manage the fans, I just put my pump on the watercooler right on the psu, and then I left the one fan on a header, I might get another fan ~60mm fan I think to put on the top of my rig and I will see how that does.

I did some cable management today in prep for Christmas and my gtx670 and I think I did a pretty good job, I might work a little harder on the side where the usb 3.0 header is, but I cant think of much to do to it.
I wish the pics were a little better, I don't have good lighting right now jealoussmiley.gif




 
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post #1136 of 2533
CPU_FAN1 header only supports fan speed control with standard 4-pin fan.
You can connect the 3-pin fans to CHA_FAN1 header to regulate the speed.

The above is per an ASROCK Rep.....

Kinda mad as I had two AP15's that I replaced with 2 PWM fans to take advantage of the PWM Feature- quiet when idle full blast when needed but I can't take that buzz noise while idle....I guess full speed it is- not too bad even at full blast and I can feel air coming out of the sides thumb.gif
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post #1137 of 2533
If I have one pwm fan for the case exhaust, and one for the cpu, which ports on the mobo should I attach them to? Or does the mobo only support one pwm (without buzzing)
post #1138 of 2533
Quote:
Originally Posted by thetrystero View Post

If I have one pwm fan for the case exhaust, and one for the cpu, which ports on the mobo should I attach them to? Or does the mobo only support one pwm (without buzzing)

only 1 header that does PWM, what you can do however is get a 4pin fan header splitter aka PWM Y cable and run it off that fan port
post #1139 of 2533
Anyone else having this issue? For some reason I can't control the small little 80mm fan on my case with the motherboard CPU fan controller with the AXP program in windows....it doesn't even control it in the bios page either. It seems the 80mm fan is just always at 100% no matter what level I set the fan speed at...I'm wondering if its because its a 4pin connector? I can control the chassis fan just fine but its a 120mm fan, don't think that'd make any difference...
post #1140 of 2533
Thread Starter 
Quote:
Originally Posted by Cakewalk_S View Post

Anyone else having this issue? For some reason I can't control the small little 80mm fan on my case with the motherboard CPU fan controller with the AXP program in windows....it doesn't even control it in the bios page either. It seems the 80mm fan is just always at 100% no matter what level I set the fan speed at...I'm wondering if its because its a 4pin connector? I can control the chassis fan just fine but its a 120mm fan, don't think that'd make any difference...
I found axtu sometimes is just garbage, have you tried speedfan?
 
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Which one? :P 
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Philip J. Fry
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Turanga Leela
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Samsung 850 Evo 250GB Western Digital Caviar Black1TB NZXT Kraken X41 Windows 7 Ultimate 
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Intel Core i5 M 480 Nvidia GeForce 310M 4gb Samsung ram 640gb Samsung HM641JI 
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Which one? :P 
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