Question 4 Fans on New Case, need help.

Nov 2, 2019
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My case -
https://www.currys.co.uk/gbuk/computing-accessories/components-upgrades/tower-cases/corsair-carbide-series-spec-delta-rgb-mid-tower-atx-pc-case-10189925-pdt.html

My motherboard -
https://www.asus.com/uk/Motherboards/PRIME-B350-PLUS/

I've got the backfan plugged into chas1 and one of the front ones plugged into chas2

They're 3pin connectors, so I got 2fans doing nothing, where do I plug these in? help please.

My case -
https://www.currys.co.uk/gbuk/computing-accessories/components-upgrades/tower-cases/corsair-carbide-series-spec-delta-rgb-mid-tower-atx-pc-case-10189925-pdt.html

My motherboard -
https://www.asus.com/uk/Motherboards/PRIME-B350-PLUS/

I've got the backfan plugged into chas1 and one of the front ones plugged into chas2

They're 3pin connectors, so I got 2fans doing nothing, where do I plug these in? help please.
 

Karadjgne

Titan
Herald
There should be a fan hub to control/connect all 3 fans in front from 1 header, the same as the RGB is controlled. You plug that hub to motherboard cha_fan2. If there's no hub, a simple 3way splitter will work just fine.
 
Last edited:

Karadjgne

Titan
Herald
Normally headers are rated at 1A @ 12v. So use of fans is limited by the power draw there. DC fans operate by voltage differential, usually 7v to 12v, so can't be powered directly by a controller unless that controller can change voltages. It's a serious drawback, because you can't add extra power sources, as they'd need controlled voltages too. This is why there's a preference for PWM fans, they require a constant 12v source, and thats easy to get, a powered splitter/hub is great. PWM are pulsed, on/off, with pwm signal, so will only get full speed when pwm doesn't switch off at all.

Corsair, for some really odd reason I cannot and honestly do not want to further expand on, has decided to use 3x DC fans in the front. Rated at 0.38A according to the fan spec. That's 1.08A for all 3 at full blast if hooked to a 3way splitter.

Which leaves you 4 options. None of which I like.
  1. Put all 3 on a splitter, and modify bios to a maximum duty cycle of 80-90%, which won't allow full blast 12v, but close, so amperage totals won't reach 1A. You'll just have to guarantee to remember any bios/cmos reset can change that value.
  2. Purchase an expensive controller, like a Commander Pro, which does have 3 or 4pin fan control capability and allows upto 5 or 6 fans, giving control via software.
  3. Buy 3 new fans in PWM that'll work as intended with no issues on a rgb splitter and fan splitter, controlled by software.
  4. Plug all 3 into a molex adapter, forget about control as they are low rpm models and should be relatively quiet.
Corsair sells those only as replacement fans, $4.99 each, they aren't otherwise available to the public in general like the SP or ML lines. Can't help but think this is a serious oversight in Corsair way of thinking, a 0.28A fan would be perfect, but 3x 0.38A DC fans is a colossal blunder.
 
Nov 2, 2019
6
0
10
0
Normally headers are rated at 1A @ 12v. So use of fans is limited by the power draw there. DC fans operate by voltage differential, usually 7v to 12v, so can't be powered directly by a controller unless that controller can change voltages. It's a serious drawback, because you can't add extra power sources, as they'd need controlled voltages too. This is why there's a preference for PWM fans, they require a constant 12v source, and thats easy to get, a powered splitter/hub is great. PWM are pulsed, on/off, with pwm signal, so will only get full speed when pwm doesn't switch off at all.

Corsair, for some really odd reason I cannot and honestly do not want to further expand on, has decided to use 3x DC fans in the front. Rated at 0.38A according to the fan spec. That's 1.08A for all 3 at full blast if hooked to a 3way splitter.

Which leaves you 4 options. None of which I like.
  1. Put all 3 on a splitter, and modify bios to a maximum duty cycle of 80-90%, which won't allow full blast 12v, but close, so amperage totals won't reach 1A. You'll just have to guarantee to remember any bios/cmos reset can change that value.
  2. Purchase an expensive controller, like a Commander Pro, which does have 3 or 4pin fan control capability and allows upto 5 or 6 fans, giving control via software.
  3. Buy 3 new fans in PWM that'll work as intended with no issues on a rgb splitter and fan splitter, controlled by software.
  4. Plug all 3 into a molex adapter, forget about control as they are low rpm models and should be relatively quiet.
Corsair sells those only as replacement fans, $4.99 each, they aren't otherwise available to the public in general like the SP or ML lines. Can't help but think this is a serious oversight in Corsair way of thinking, a 0.28A fan would be perfect, but 3x 0.38A DC fans is a colossal blunder.

So looks like number 4 is my best option lol.
https://www.amazon.co.uk/KabelDirekt-20-20-20cm-3-pin-2-pole-connector-fan-distribution/dp/B01LFCB3TS/ref=sr_1_2?keywords=3pin+fan+to+molex&qid=1572807340&s=computers&sr=1-2
would this do okay?

or could you link me to one on amazon?
 

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