Help on case airflow

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jumpycarogna

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Nov 17, 2014
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Hi all!
I need some help with case airflow.
I just got myself a new case, the CoolerMaster CM690 III. It came with a rear exaust fan and one front intake one, both 120mm.
At the same time, I decided to switch to watercooling for my CPU, a i7-4790k. The cooler is a Fractal design Kelvin S24-BK and it features a 240mm radiator.
I decided to mount the radiator on top of case, with both fans being exaust ones.
Actually I don't have any particular issue, but I'm planning to get a hybrid gpu and swap its radiator with the rear fan.
My actual GPU is a 980ti Gaming 1, I might pick a 1080 Xtreme Water cooling eventually.
Will my CPU cooler fans and GPU one efficiently work as exaust fan? Also is it enough just one intake fan (front one)?
Since the PSU is kind of big, RM1000, I don't think I have enough space for a bottom fan.
Please advise, thank you guys!
 
Solution
bboiprfsr



Yes, your cooling config is good enough. Usually with aircooling, you have heat dissipating outside of the heatsink, which then must be transferred via air with the use of fans to blow the heat away. Now, with water cooling, that heat is absorbed by the copper to the water and then transferred away via exhaust radiator fans. Therefore, the heat isn't leaked into your case or other components and doesn't require a huge demand on excess fan use. You can add an extra bottom fan, whether...
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pepslight

pepslight

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Sep 20, 2014
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Hey jumpycarogna, First of all pardon me if I didn´t fully understand your question, English is really not my language, if I got it right, you have this monster hybrid Water cooling fan on top of the case as exhaust, and now a normal 980ti but "soon" you will get a Hybrid 1080 and use on the back of the case as an Exhaust, and you wondering if the Airflow is good ?,

If I got it right, :no: :lol: you need to consider the air pressure inside your case, you have already those gigantic radiator taking fresh air out of the case and only 1 bringing air in. You will build Negative air pressure and it could (Will probably) affect your final cooling performance, negative pressure is the worst thing you could get into your case, the fans simply won´t have any "fresh" air to exhaust from, but it´s not so bad giving the size of the front fan 200mm. to remedy this I would consider trying to add a 120mm at the bottom as intake if before you add the 1080 as exhaust
 
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bboiprfsr

bboiprfsr

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Dec 23, 2013
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Yes, your cooling config is good enough. Usually with aircooling, you have heat dissipating outside of the heatsink, which then must be transferred via air with the use of fans to blow the heat away. Now, with water cooling, that heat is absorbed by the copper to the water and then transferred away via exhaust radiator fans. Therefore, the heat isn't leaked into your case or other components and doesn't require a huge demand on excess fan use. You can add an extra bottom fan, whether it's 120mm or 80mm, for insurance, but that's highly up to you. You mentioned not having enough space, yet i've seen some people attach a fan to pull heat from their hard drives but it seems redundant. In my opinion, you're fine. cheers!
 
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jumpycarogna

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Nov 17, 2014
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Hi pepslight! Hi bboiprsfr!
Thank you very much for your time guys.
English is not my language as well, so sorry if my English is not clear enough!
On top of case I've installed CPU cooler radiator (2x 120mm fans), front intake fan (120mm) and rear exhaust fan. My question is if I would be all right if, not sure yet cause I might wait for 1080ti, I would swap rear exaust fan with the one of the hybrid GPU I'm willing to get. I was told that my PSU is too big for a bottom fan, let's see if it can fit a 80mm as suggested by bboiprsfr.
If not possible, I may add a second 120mm fan on front since there is enough space. I just have a SSD so maybe with 2 front fans I could avoid the negative pressure pepslight mentioned.
Please advise.
 
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