1 200mm Intake

[thegerm22]

Case is a Cooler Master HAF XM with drive cages removed.

 

Fan setup:

Front intake: 200 mm Cooler Master Mega Flow

Rear exhaust: 140 mm Corsair AF

Top exhaust: 2 Noctua NF-P12 pushing air through an H100i.

GPU: Asus Direct CUII 7970

 

Question: Is one 200 mm intake enough to keep system cool? Or should I intake air from the top rather than exhaust?

[squirtle4287]

It'll be plenty, watch LTT's video on case fans.

[IMPERIUS]

Yes

[Enderman]

you have negative air pressure

you need more fans blowing in than out

[thegerm22]

you have negative air pressure

you need more fans blowing in than out

 

Other than potential dust problems, negative pressure isn't necessarily a bad thing. There are arguments for both negative and positive pressure.

[Enderman]

Other than potential dust problems, negative pressure isn't necessarily a bad thing. There are arguments for both negative and positive pressure.

hes got one fan blowing in and 3 blowing out

and 200mm fans are not very good with airflow vs surface area

[LogicalDrm]

Yeah, its enough. I have 200mm in and 2x140mm out. Working fine. If you have problems with CPU temps, make rear exhaust intake instead. Currently it doesn't really do anything since H100i is quite enough to exhaust on its own.

[PumaXCS]

hes got one fan blowing in and 3 blowing out

and 200mm fans are not very good with airflow vs surface area

 

Positive and negative pressure is based on CFM not amount. Granted in this case, it doesn't change the results he has negative pressure but you are overthinking it.

 

1 200mm is fine for intake, as LoGiCalDrm said, change the rear to intake if you find its not in a good range but really shouldn't be anything to worry about.

[Enderman]

Positive and negative pressure is based on CFM not amount. Granted in this case, it doesn't change the results he has negative pressure but you are overthinking it.

 

1 200mm is fine for intake, as LoGiCalDrm said, change the rear to intake if you find its not in a good range but really shouldn't be anything to worry about.

one 200mm fan does not have even close to the CFM of three 120/140mm fans

[PumaXCS]

@Enderman I agree, you are right. In this case he does have a negative pressure because the 3 exhaust fans CFM is greater than his intake CFM, even 200mm at max and the others at low as possible. I was just making sure he understood the difference that CFM changes the reasoning behind the pressure change not the amount of fans.

 

I said you are overthinking it because the amount of air he is pushing won't make anything overheat, which is what he is asking.

[thegerm22]

@Enderman I agree, you are right. In this case he does have a negative pressure because the 3 exhaust fans CFM is greater than his intake CFM, even 200mm at max and the others at low as possible. I was just making sure he understood the difference that CFM changes the reasoning behind the pressure change not the amount of fans.

 

I said you are overthinking it because the amount of air he is pushing won't make anything overheat, which is what he is asking.

 

Thanks PumaXCS, this is the sort of info I was looking for. I appreciate everyone's comments.