2x120 AIO with one fan intake and the other exhaust. Any drawback

[jafanello]

Hi all, I am trying to balance the intake/exhaust ratio in my build. 

The AIO is a Corsair h100i Platinum mounted on the top. Does mounting the two fans running in different directions have any drawback? 

 

Thanks

[DoctorNick]

[jafanello]

2 minutes ago, DoctorNick said:

Hi DoctorNick,

thanks for the explanatory picture.

 

So i suppose there is no drawback in having the two portions of the radiator with airflows in different directions. 

I wanted just to be sure that I wasn't doing something completely stupid.

 

 

[Jumballi]

are you saying you have 2 radiators or and just flipping one of the fans?
im going to assume that you're flipping the fans, which is a bad idea because the most accessible air the fan will get is the hot air the other fan just spit out

just go with some extra pressure on one side, not the end of the world with some lost efficiency, just add a fan in the future if it bothers you that much

[DoctorNick]

5 minutes ago, jafanello said:

Hi DoctorNick,

thanks for the explanatory picture.

 

So i suppose there is no drawback in having the two portions of the radiator with airflows in different directions. 

I wanted just to be sure that I wasn't doing something completely stupid.

 

 

I see.. If you only have one intake fan, just add another one as @Jumballi says. Another draw back from one intake fans vs. 2x out is more dust, because of negative pressure. To combat that you could move your radiator to the front of the case. If you do that mount as shown below:

[Samfisher]

2 fans together.  Having 1 fan on the other side also causes stress on the mounting on your casing as only 1 fan set of screws is holding it up.  The 2nd fan is also blowing hot air from the GPU through the radiator so that's also a no go.

[DoctorNick]

2 minutes ago, Samfisher said:

Both fans should be facing the same side, this is what we call a push-pull config (one fan pushes air, another pulls).

But its a h100i (240mm) with 2x fans. So push-pull is not an option.

[Samfisher]

Just now, DoctorNick said:

But its a h100i (240mm) with 2x fans. So push-pull is not an option.

I edited the entire post when I figured out it was a 240mm rad   The title confused me, I only saw 2x120 so assumed it was a single fan rad.

[Jumballi]

8 minutes ago, DoctorNick said:

I see.. If you only have one intake fan, just add another one as @Jumballi says. Another draw back from one intake fans vs. 2x out is more dust, because of negative pressure. To combat that you could move your radiator to the front of the case. If you do that mount as shown below:

the negative/positive thing has shown to make no difference until you're at like 3 fans more than the other, and dust will always find as way.

best solution is airflow from from of case towards the exhaust.

[DoctorNick]

3 minutes ago, Jumballi said:

the negative/positive thing has shown to make no difference until you're at like 3 fans more than the other, and dust will always find as way.

best solution is airflow from from of case towards the exhaust.

That depends on 1. the case. 2. fans used.

[jafanello]

Thank you all guys for he suggestion. 

I have a total of 4 fans plus the additional 2 of the AIO. 

Sorry for not being clear. The AIO is a 240 with  two 120 fans. 

 

It would be in perfect balance if it was not for the PSU fan which is actually causing to have negative pressure inside. 

Maybe I can just remove one of the fans.

 

[jafanello]

The case is a Corsair spec 06

[Jumballi]

1 minute ago, jafanello said:

Thank you all guys for he suggestion. 

I have a total of 4 fans plus the additional 2 of the AIO. 

Sorry for not being clear. The AIO is a 240 with  two 120 fans. 

 

It would be in perfect balance if it was not for the PSU fan which is actually causing to have negative pressure inside. 

Maybe I can just remove one of the fans.

 

you can flip the psu

[jafanello]

1 hour ago, Jumballi said:

you can flip the psu

That's interesting.

Do you mean opening the PSU and rotate the fan in order to push air in instead of out?

[Jumballi]

24 minutes ago, jafanello said:

That's interesting.

Do you mean opening the PSU and rotate the fan in order to push air in instead of out?

No you can just install the power supply upside down, it will just get air from outside the case if there are ventilation holes on the bottom of the case

[Tristerin]

So top mounted 240 rad and you are wanting to put one as intake and one as exhaust?  

 

Does it matter....negligible.  Would I?  Are you looking to create neutral pressure?  While neutral pressure keeps cases cleaner longer, it also creates hot spots in PC cases.  I prefer positive or negative.  Just curious why you want this balance.

 

EDIT - I currently have a top mount intake in trial (to see how I like it myself) and I don't.  It doesn't help thermals in my situation, and only adds more dust on the top of the case.

[jafanello]

9 hours ago, Tristerin said:

So top mounted 240 rad and you are wanting to put one as intake and one as exhaust?  

 

Does it matter....negligible.  Would I?  Are you looking to create neutral pressure?  While neutral pressure keeps cases cleaner longer, it also creates hot spots in PC cases.  I prefer positive or negative.  Just curious why you want this balance.

 

EDIT - I currently have a top mount intake in trial (to see how I like it myself) and I don't.  It doesn't help thermals in my situation, and only adds more dust on the top of the case.

Hi, 

I was trying to avoid build up of excessive dust, that is why i was trying to get neutral pressure, or at least a bit of positive pressure.

[jafanello]

9 hours ago, Jumballi said:

No you can just install the power supply upside down, it will just get air from outside the case if there are ventilation holes on the bottom of the case

Thanks for this. That's great. Itmactually has holes on the bottom that I did not notice when mounting it. 

I am going with this. Cheers