Where does this corsair h45 pins connect to?

melad26 · Apr 3, 2017

hello there I BUY corsair h45 AND MY MOTHERBOARD IS H170A PRO GAMING MSI

i have 3 pin and 4 pin capels .

i install 3 pin on sysfan1

and install 4 pin in cpufan 1

so is this ok ?

becouse when install this i have over 3000 rpm .

, and when i install
3 -pin in cpufan 1 , and 4-pin in cpufan2
i have over 4000 rpm ?

so which method i install

and i have in my motherbaord just cpufan1,cpufan2,sysfan1,sysfann2,sysfan3

this is default when i put pin4 in cpufan1 and pin3 in cpufan 2
http://store6.up-00.com/2017-04/149126838794321.jpg

when i edit fan speed no effect ? i dont know why ? see img
http://store6.up-00.com/2017-04/149126847268291.jpg

so i replace it as befor
pin 4 to cpufan1 and pin3 to sysfan1
and default for rpm for pin3 = 2500
http://store6.up-00.com/2017-04/149126862089441.jpg

James Mason · Apr 3, 2017

I believe the 3pin should connect to CPUFan2 as it controls the pump on the watercooler and is for the CPU so keep them together.
Also i'm pretty sure the fans can't spin that fast, so maybe you're reading soemthing wrong.
You should be able to control the fan speeds from within the BIOS or using MSI Gaming App/MSI Command Center (download from motherboard driver/utility page)

melad26 · Apr 3, 2017

this is default when i put pin4 in cpufan1 and pin3 in cpufan 2
http://store6.up-00.com/2017-04/149126838794321.jpg

when i edit fan speed no effect ? i dont know why ? see img

so i replace it as befor
pin 4 to cpufan1 and pin3 to sysfan1
and default for rpm for pin3 = 2500
so i can edit the rpm speed

James Mason · Apr 3, 2017

The 3pin fan connects to the pump, so it's RPMs don't matter/mean anything, you actually probably want it to be as high as possible, because if the pump isn't moving liquid, the cooler isn't working at all, so it's okay if it claims to be running at 4k RPMs that most likely just means it's running at whatever it's full speed is.

The CPU fan should max out between 2200-2400 RPMs.

Karadjgne · Apr 3, 2017

Yes, those corsair fans will hit 4000rpm on those smaller aios. Corsair's instructions say to put the pump wire(3pin) on cpu_fan and the fan wire(4pin) on sys_fan. Personally I think that's asinine, but Corsair does it that way for the sole reason that if the pump fails, the cpu_fan header will see 0rpm and fail to boot the pc.

You can set it up either way, the cpu_fan header is pwm (4pin only for control) and sys_fan will do either. Personally I prefer the fan on cpu_fan as the fan will then operate according to cpu temps. If the fan is on sys_fan, it'll operate according to the motherboard / case temps.

melad26 · Apr 4, 2017

thx u all for reply
3pin = cpufan1 , 4pin=cpufan2
and its run all time 4k rpms in cpufan 1 (pump)

and the fan (cpufan2 -4pin) i make it for run (800)rpms under 50 degree .

so is this fine 800 ?

James Mason · Apr 4, 2017

as long as it's under 50c degrees, sure.

melad26 · Apr 4, 2017

James Mason :

thx u

Karadjgne · Apr 4, 2017

The fans on my radiators (h55 and nzxt Kraken X61) generally run 450rpm at idle and 650ish under gaming loads although both are capped at 900rpm max. Basically dead silent-barely audible. So 800rpm is good if your game temps are under 50°C

melad26 · Apr 5, 2017

Karadjgne :

THX Karadjgne for reply , will i change all connects cabels , drone noise at 4k rpm pumpspeed is hight , and its loud sound , so i change this to put cabel pupm to sysfan not cpufan to contral speed rpm to1500- 2000 rpm and the sound load now is less than befor .and degree is good , so i dont know if this way dangers

and controal cpufan to 800 rpm - 1400 rpm

and degree with load = 45
and degree with idel = 30

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