Multiple fans on a Gigabyte GA-Z87-D3HP Motherboard

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ice2kewl

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Hiya,

I have a GA-Z87-D3HP motherboard: http://

I've just bought a corsair h75 cooler, which comes with 2 fans. http://

My motherboard has OPT fan support [CPU_FAN + CPU_OPT] so that should cater for the h75 with its double fans?

I have 2 x 140 mm fans at the front. They take up SYS_FAN 1 and 2.

I will place 2 x 120 mm corsair stock fans at the top, however I only have SYS_FAN3 available.

What's the best route in connecting both the 120 mm fans to SYS_FAN3? A fan splitter cable or should I connect one of the fans directly to the PSU? I understand the latter would result in the fan always running at maximum, resulting a more noise. So am edging towards getting a fan splitter cable. Can my motherboard support 2 fans on a single port? What's the best splitter cable to get? Is there anything bespoke that I have to do with the fan wires so to stop both fans sending signals to the m/b and causing confusion in temp readings? Anything else?

Thanks
 
Solution
legend001523
connect the fans that you want on full speed to the psu and yeah, you can get 3 pin to 3 x pin cables , but I'd recommend you just have 2 fans per header, just incase the voltage might overflow the board
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ice2kewl

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This ok? http://
 
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sora

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+1, these are cheap and will definitely get the job done. OP, I can guarantee that you probably do not have PWM fans.
 
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ice2kewl

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Thanks for all the responses so far guys. I thought I'd inspect my pc before ordering anything. I can confirm my fans are not PWMs [except the 2 fans coming with my cooler], so the 3 pin adapter is the way to go. The SCAN one is cheap, but they charge a delivery cost. So I'll go with amazon options, like the BitFenix.

Originally I was looking to power 2 fans via the adapter. However, I may want to power a 3rd fan now too. So i'm thinking I should just get this molex to 3x3pin adapter to power 2 fans, while the 3rd can be powered by the vacant mobo fan header.

So in a nutshell, the front 2 x 140mm fans will be powered via the psu and will run at 100%, while the 2 x 120mm top and 1 x 120mm bottom fans will be powered by the mobo's 3 fan headers. Finally, the h75 cooler and it's double fans will be powered by the cpu + opt headers.

Whatchya guys think?
 
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legend001523

legend001523

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I'm not sure but I don't think you can control the speed on 3 pin fans via the motherboard headers, I think AI suite ( Which is software that comes with asus mobos) can but that's it, if you want tpo control the speeds you may need a 4 pin fan
 
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ice2kewl

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My mobo comes with gigabyte easy tune software, through which you can control voltage of fans. Believe this controls the speed for 3 pin fans. It's definitely doing something, because my pc gets considerably louder upon stress [gaming].

Even if I was to connect my fans via the mobo 3x3pin splitter, how would the mobo control the speed of both fans on one header? Would it be the case of the mobo reading just one fan's signal and setting the speed accordingly for both fans?
 
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legend001523

legend001523

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Yes i think so, or it just powers both to their full speed
 
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ice2kewl

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OK, I'm definitely going with the molex to 3x3pin cable. My last question, this cable comes in 5V, 7V and 12V flavours.

I'm thinking the 7V is more than enough to power 2 fans. [It's the same price as the 5v version]. Agreed?

This one
 
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