Question about push/pull for CPU Coolers & Corsair H50

Soldato
Joined
11 Apr 2004
Posts
4,413
I was wondering. If you put two fans on a Cpu cooler or a H50 and have one fan connected the cpu fan socket what do you connect the other fan to? One of the chasis fans on your mb or directly to the psu? And which fan do you connect to the cpu fan socket, the fan pulling air into the heatsink or the one exhausting it away?
 
It will depend on the type of pin connection the fan uses, ill use my experience with a thermalright ultra push/pull config as an example. The fans i used were 2000 rpm sharkoon silent eagles, theese are 3 pin fans, i had one connected to the cpu header (cpu header is 4 pin pwm) second fan was connected to the pwr fan header. this left both fans running at full speed of 2000 rpm, my particular motherboard couldnt speed control a 3 pin fan on the cpu header, the next option is pwm (pulse width modulation)

Pwm fans use a 4 pin connection (similair to what you see on a stock intel/amd cooler) theese have a speed range, ie 400-1200 rpm, you can stick a single pwm fan onto the motherboards cpu fan header on a heatsink, or if you go for the push/pull config you can use one of theese adapter cables.

http://www.overclockers.co.uk/showproduct.php?prodid=CB-031-AK&groupid=701&catid=48&subcat=

This cable allows the use of upto 3 pwm fans, you simply plug the 4 pin molex connector to your psu, plug the pwm connector to the cpu header on your motherboard, then add your fans. In a push pull setup you need all fans running at the same speed.
 
sorry to jump in but i'm going to be doing this today as long as the delivery man gets here.

i've got 2 pwm fans coming so i'll be connecting them up to a corsair h50 in push/pull with the lead specified above.

tho i didn't know you still had to connect the 4 pin to the psu so thanks Setter. :)

Jobe
 
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