How to set up a push/pull

schray

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Hi!

I have a i7-4771 and I plan to change the stock cooler on it. I doesn't want a top-flow cooler, but my case is small, it only accepts max 154mm towers. My choices for tower heatsinks are limited. I choose a Zalman CNPS10X Optima. It comes with a "shark-blade" fan, but it accepts a second one. I have already two CM Jetflo, one is side panel intake, on is rear exthaust right now. I can't use the side panel intake anymore, once I installed the cpu heatsink.

I plan to install one Jetflo as 'pull' to the tower. How would it be better?
1. Push: stock zalman shark-blade fan. Pull: Jetflo, Rear: Jetflo
2. Push: Jetflo. Pull: Jetflo. Rear: zalman
3. Push: Jetflo. Pull: zalman Rear: Jetflo

The Jetflo-s are pretty strong, but loud as well, I have enough PWM ports to control them, but I'm worried, two Jetflo-s as a cpu fans will be very noisy, once the cpu heats up.

What do you think?
 
I would go with the "standard" fan and see what temps you get. After that I would focus on improving case ventilation before I put a 2nd fan on the cooler itself.

I'm always worried that if the two fans aren't designed to work together, they may impede the airflow more than help it.
 

schray

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Yes, that's why I'm asking. Though, I doesn't have any more slots for the side fan, bit it has to come down, because the cnps10x can't fit otherwise. So, the only place I can put the second JetFlo is the heatsink.
 

schray

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There is a preinstalled intake fan in the front, but it's tricky to acces, I doesn't want to change it,
 

schray

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Next weekend I install the cooler, and I'll try different setups. I might can't install the Jetflo on the heatsink, the JetFlo screw hole doesn't have a gap between the sides, and according the pictures from CNPS10X, the clamps need it. :/