Optimal fan configuration PLEASE HELP

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Larry_The_Great

Honorable
Jan 16, 2014
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Hey forum members,

I currently own a Phanteks Enthoo Primo and I am considering fitting it full of fans to ensure minimum temperature. Cost isn't a major issue so I was wondering if some members on the forum could help me out. I have created this diagram as what I imagine would be the optimal fan configuration for this case. I have tried to get a positive pressure in the case so that more fans are in-taking than out-taking as I've heard that this gives better cooling performance. Also I have tried to keep the lower parts of the case in-taking because the coolest air will come from the bottom and outtake from the top as the hot air rises.

eaQzkJW.png


Please tell me what you think of this configuration and give me any recommendations for a possible better configuration. I'm open to all ideas. Also please give me some recommendations for which fans to use. I'm currently looking at Corsair's SP120 and AF140 fans because I've heard that they are pretty good as well as they look nice as well.

Thank you for your help! I really appreciate it!
 
Solution
volcanoscout
I would recommend starting with two intakes in the front, one rear exhaust and one top/rear exhaust. I'd go with 140s all around as you can typically get the same CFM as a 120 but at lower RPMs and still have capacity to call on at need. The AF140s are a good choice.

Unless you're running multiple GPUs, that's probably all you'll need. If you have to have more, add a 120mm in the bottom. Although filling all the fan mounts looks pretty cool, more than likely they'll just interfere with each other and disrupt the smooth flow of air into and out of the case. For example, adding fans to the top/middle and top/front mounts will steal cool air from your CPU cooler.

As far as negative/positive pressure goes, from the studies and tests...
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volcanoscout

volcanoscout

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Jan 5, 2014
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I would recommend starting with two intakes in the front, one rear exhaust and one top/rear exhaust. I'd go with 140s all around as you can typically get the same CFM as a 120 but at lower RPMs and still have capacity to call on at need. The AF140s are a good choice.

Unless you're running multiple GPUs, that's probably all you'll need. If you have to have more, add a 120mm in the bottom. Although filling all the fan mounts looks pretty cool, more than likely they'll just interfere with each other and disrupt the smooth flow of air into and out of the case. For example, adding fans to the top/middle and top/front mounts will steal cool air from your CPU cooler.

As far as negative/positive pressure goes, from the studies and tests that I've read, negative air pressure is more effective for cooling than positive. Positive is better for reducing dust ingress. I typically run a slight positive for casual use and a slight negative when benchmarking and it's worked very well for me both with temps and with dust reduction. You can shift the pressure by increasing or decreasing your fan speeds - for negative, run your exhausts slightly faster than your intakes, and the opposite for positive.
 
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