Best way to run 6 case fans

Danny75 said:
Thank you.

According to the specifications https://www.asus.com/us/Motherboards/H170-PRO-GAMING/specifications/ it has 5 fan headers in total - CPU, CPU_OPT, 3 x Chassis/Sys_Fan.

The Intel stock cooler will be using the CPU_FAN header, I presume?

Rear fan can go into CPU_OPT.

Two top fans can go into 2 x Chassis/Sys_Fan headers.

And the three front fans can go into the remaining Chassis/Sys_Fan header, with the help of this 3-way splitter:

My basket at Overclockers UK:

Total: £5.73
(includes shipping: £2.74)



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The description for the splitter states it also works with 3-pin DC fans.

Tip: don't have the two top fans running as fast as the others, or they'll exhaust cool air (I'm assuming they exhaust) before it washes across the motherboard and CPU. Given you have 3 front fans, those may not need to spin too much either, with their combined CFM. The one I'd want faster than the others is the rear fan.

Like Brizzles said - if you encounter any issues with CPU temps it will mean the stock cooler itself isn't good enough for your chip.
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Thank you for your detailed comment I will order this splitter and try out the way u have described to do it.
 
Bewsher88 said:
Thank you for your detailed comment I will order this splitter and try out the way u have described to do it.
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You're welcome mate. Never tried that splitter but if it's like what it says on the tin, all should be good.

I looked up the amp pull for the Corsair SP 120 High Performance RGB (those the ones you're using?) but all I found was the info for the regular SP High Performance fans (0.18 amps = 2.16 watts on max RPM/12v). Hoping they won't be very different in that respect, so that the three fans on the same splitter/header will be well below the 10 watts max of the fan headers.

If it doesn't work, try the splitter on the CPU or CPU_OPT header instead, those can often be of better quality than Chassis_Fan headers.

Good luck and do let us know how it went.

Oh yeah, one more thing, being a PWM splitter by default (although it says its capable of 3-pin DC operation too), your motherboard BIOS/software may or may not require you to set DC instead of PWM for the header the splitter uses (if it has the option). Or it may try to remain on PWM and not work, or try to run the fans at full whack.
 
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Cool thank you. It does say in the write up on that splitter that rpm sensing will only work on one fan when using this cable does that mean the other two fans will run full speed? Or they will run the same speed as the one fan that is being sensored.
 
Bewsher88 said:
Cool thank you. It does say in the write up on that splitter that rpm sensing will only work on one fan when using this cable does that mean the other two fans will run full speed? Or they will run the same speed as the one fan that is being sensored.
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The way it's written implies that it will read the speed of one fan (this is normal with a splitter, and you assume the other fans will synch more or less, with a little variation, which is also normal as every unit is a little faster or slower). The cable will pass through the same voltage to all fans, so if your motherboard fan header can provide some DC fan speed control (and I believe it does), and you can set the header to DC (or it does so automatically) then you can set some kind of fan curve.

If the splitter ends up running DC fans at full 12v even on a motherboard with DC fan speed control, I'd send it back for a refund, as the description fails to state this will happen. And it's something that ought to be stated, were that the case.
 
hey guys ordered the cable splitter and it arrived today fitted it and its perfect thanks works just how I needed it too. ive setup all fans like you said to in an earlier post and its working a treat. thankyou ;-)
 
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