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Help choosing fans

post #1 of 12
Thread Starter 
Hello all i got this case

http://www.fractal-design.com/home/product/cases/discontinued-products/define-xl-black-pearl

Currently i have 3 fans on the front , 1 in the back and one on the top

I want to change one of the front fans the 120mm one because is making alot of noise. I am considering this one :

http://www.eworld.com.gr/products/details/2841

The problem now is that i want to control the fans with ASUS FanXpert. My motherboard has 3 optional fan connectors ( ASUS Z170 PRO GAMING ) and i have connected the following fans:

- Top Fan
- 2x Front fans

I also want to control the 3rd front fan.

If i buy a fan spliter like this http://www.eworld.com.gr/products/details/4976

will i be able to control the 3rd fan? Also does the fan need to be a PWM one? I want the fans to be connected to the motherboard to control them

thanks
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post #2 of 12
Thread Starter 
anyone?
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post #3 of 12
The fan you have linked is voltage controlled (3-pin) so that splitter doesn't make sense for this.

What kind of fans are your others? Are they DC or PWM (4-pin)?
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post #4 of 12
Thread Starter 
Quote:
Originally Posted by Dagamus NM View Post

The fan you have linked is voltage controlled (3-pin) so that splitter doesn't make sense for this.

What kind of fans are your others? Are they DC or PWM (4-pin)?

Thats my problem i dont know 😂
All the 2 front fans are fractal ones included in case and i have put another one that can be only connected with molex.. Thats the fan i want to change

I dont know the difference between PWM fans ..which type of fans should be connected to the motherboard to control them? All my fans are 3 pin
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post #5 of 12
PWM is Pulse Width Modulaton. PWM fans have 4 leads; Grd, 12v, rpm & PWM. The fan runs on 12v only, but that 12v pulse speed and length is changes to control the fan's speed .. constant 12v is full speed while very slow / low number of pulses per mijnute is low speed

Variable Voltage is just that. The voltage is lowered from 12v to 10, 8, 6, etc to lower the rpm.

Most case fans are variable voltage.

For more information "Ways to Better Cooling" link in my sig has an index with topics on PWM, case airflow, fan performance (P-Q curve). Click on topics of interest to see them.

Your fan with molex could be added into the case fan control system with a 3-pin fan plug to molex adapter, then it will run at lower speeds. This one has both male and female molex. Plug your molex fan into molex adapter and adapter to fan controller.
post #6 of 12
Thread Starter 
Quote:
Originally Posted by doyll View Post

PWM is Pulse Width Modulaton. PWM fans have 4 leads; Grd, 12v, rpm & PWM. The fan runs on 12v only, but that 12v pulse speed and length is changes to control the fan's speed .. constant 12v is full speed while very slow / low number of pulses per mijnute is low speed

Variable Voltage is just that. The voltage is lowered from 12v to 10, 8, 6, etc to lower the rpm.

Most case fans are variable voltage.

For more information "Ways to Better Cooling" link in my sig has an index with topics on PWM, case airflow, fan performance (P-Q curve). Click on topics of interest to see them.

Your fan with molex could be added into the case fan control system with a 3-pin fan plug to molex adapter, then it will run at lower speeds. This one has both male and female molex. Plug your molex fan into molex adapter and adapter to fan controller.


Can i plug my molex fan to the molex adapter and then connect it to the motherboard to control it through the AiSuite ? Which fans are best for controlling them through software? PWM ones or non PWM ones?
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post #7 of 12
I prefer PWM fans. Your motherboard may or may not actually support PWM on all of the fan headers even with with them being four pin headers. The Asus rampage boards do, but I know some others do not. You will have to look this up for z170.

As far as with are better, I believe PWM are quieter especially when run at lower speeds. To slow a 3 pin fan the voltage needs to be dropped, this is done through resistance which generates heat.

The be quiet fans are nice looking. I prefer noise blocker myself but almost anything in PWM will net you better results unless you just run them at full blast.

AI suite gives you some control but not as good as a dedicated fan controller. I have aquaero 6's in four of my rigs and I love them. EK is supposed to be releasing one at some point so you might use AI suite until that comes out, if you are happy with your results from AI suite then great, if not you have options.

If you go PWM, then you should try and have all of your fans be PWM. Otherwise just get a regular fan.

You can also get an adapter from moles to three pin fan or you can cut and splice of get some new pins and a three pin header. If you take your fan to a local electronic parts shop you can probably get them to cut and crimp pins on for you then just use the fan without having to buy anything new.

It is all about what you want to spend at this point.
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post #8 of 12
Quote:
Originally Posted by patriotaki View Post

Can i plug my molex fan to the molex adapter and then connect it to the motherboard to control it through the AiSuite ? Which fans are best for controlling them through software? PWM ones or non PWM ones?
That is what the adapter is for .. to give you a 3-pin fan plug on your fan. Doesn't matter where you plug it in, but if other case fans are all on case fan control, why not add this one to them?

You can use the "Y" splitter you show with no problems .. assuming the fan are less than 5watts each. Mobo fan headers are usually rated for about 1 amp maximum load.

Why a top intake? 3x front intakes are better than 2x front and 1x top intakes.
post #9 of 12
Thread Starter 
Quote:
Originally Posted by doyll View Post

That is what the adapter is for .. to give you a 3-pin fan plug on your fan. Doesn't matter where you plug it in, but if other case fans are all on case fan control, why not add this one to them?

You can use the "Y" splitter you show with no problems .. assuming the fan are less than 5watts each. Mobo fan headers are usually rated for about 1 amp maximum load.

Why a top intake? 3x front intakes are better than 2x front and 1x top intakes.


i have 3 for intake 1 top for exhaust and one rear also for exhaust the top fan is in an angle. I will buy two Y splitters and two Corsair AF 120 fans to replace the one front and one rear fan because they are making noise... and i will connect the splitter to the motherboard... is that good?
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Samsung 820 120GB SSD Samsung 840 EVO 250GB SSD Samsung 850 EVO 250GB SSD Western Digital Blue 500GB 
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Corsair RM650x Corsair 400C ROCCAT TYON Razer Goliathus Speed Extended 
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Hard DriveHard Drive
WD Blue Kingston SSD 
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AMD FX 8350 Black Edition @ 4.22Ghz ASUS CROSSHAIR V FORMULA Z Sapphire 7870 Flex GHz edition G Skill TridentX 16GB @2133Mhz 
Hard DriveHard DriveHard DriveHard Drive
Seagate Barracuda 7200rpm (RAID 1) Seagate Barracuda 7200rpm (RAID 1) Samsung 840 PRO (RAID 0) Samsung 840 PRO (RAID 0) 
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Pioneer Bluray Reader/Writer 2x NZXT NS-F200 Fans Windows 8 Pro LG 27" FULL HD 
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post #10 of 12
I have not used the Define XL but have used Define R2 & R4. 3x intakes was all I ever needed. 2x front and 1x bottom. I used 140mm PWM fans controlled by mobo CPU fan header and GPU fan header PWM signals. This means case fans change speed and supply air as need by component fans. All explained in "Ways to Better Cooling" link in sig.
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