AIO Radiator fans in push, pull or push/pull and which location is best?

[ArttuJ]

So about 13 months ago I bought a H110i GTX for my CPU. When I set it up, I mounted it in the roof of my Phanteks Enthoo Pro case with the fans pulling air through the radiator from outside the case. After this I never really gave it much thought. However recently I started thinking about how I only had one fan pulling air out of the case with this setup. Here's an Imagine showing my old setup with fans:

Now, I'm pretty sure I read somewhere that having better exhaust than intake is better, don't know if this is true though, so I changed the setup to be like this about one month ago:

With this new setup, I actually noticed that my CPU temps have actually increased slightly, if I remember correctly they've risen in temperature about 5-7 degress celcius. I imagine that this is because it's now pushing hot air from inside the case through the radiator.

I watched a LinusTechTips video where he said that push/pull is pretty much unessecary and that he recommends pull instead of push, because of it being easier to clean the radiator when the fans are mounted in pull.

So can someone clarify wether more exhaust than intake is better and if there are any other reasons to have push or pull? With the way things are now, I feel like going back to my old setup of the radiator pulling air into the case through the radiator.

EDIT: Fan in the front of the case is 200mm, fans in the top and the back are 140mm.

 

[CountMike]

I'm firm believer in setup like on second picture. Radiator fans have less of flow then case fans sso they don't evacuate air too much. Also can't just concentrate efforts on radiator cooling, cross flow in the case is also very important.

 

[Zerk2012]

Pic 2 is the way to go. Push on the rad unless your having temp problems their no reason to have push/pull.

 

[ArttuJ]

Pic 2 is the way to go. Push on the rad unless your having temp problems their no reason to have push/pull.

Any reason for suggesting push rather than pull?

 

[CountMike]

Yes, Radiator fans are optimized for higher static air pressure and that wouldn't be important for pull configuration.

 

[ArttuJ]

Yes, Radiator fans are optimized for higher static air pressure and that wouldn't be important for pull configuration.

What about the points brought up here https://www.youtube.com/watch?v=UyC3lZ5WFMk

 

[frank_hnd]

try with a pull config... I feel the SP fans perform better at pulling air than actually pushing air through a radiator.

 

[CountMike]

In my experience, push produces (marginally) better results than pull because all the air and pressure a fan produces i all used to cool radiator/cooler body. Pull in push - pull config produces marginally (but some times important) help to push fans to do do their job.
I recently experimented with my Nepton 140XL cooler by shutting down one or other fan in push - pull configuration. Under full load and same conditions, push fan by itself gave me about 5c lower temps than pull fan alone. Both fans were better by 2 - 3c than push fan alone. Pull fan helped the push fan achieve about 150 RPM more than pull fan could all by itself.
So, all together, those 7 - 8c gained means a lot to me because of large processor OC, without that OC it didn't matter at all as well as it wouldn't help anything while on idle. It showed up only under extreme load.

 

[ArttuJ]

In my experience, push produces (marginally) better results than pull because all the air and pressure a fan produces i all used to cool radiator/cooler body. Pull in push - pull config produces marginally (but some times important) help to push fans to do do their job.
I recently experimented with my Nepton 140XL cooler by shutting down one or other fan in push - pull configuration. Under full load and same conditions, push fan by itself gave me about 5c lower temps than pull fan alone. Both fans were better by 2 - 3c than push fan alone. Pull fan helped the push fan achieve about 150 RPM more than pull fan could all by itself.
So, all together, those 7 - 8c gained means a lot to me because of large processor OC, without that OC it didn't matter at all as well as it wouldn't help anything while on idle. It showed up only under extreme load.

Well if 7c matters much then surely i should use them like i did in my first pic? When i used them to pull air through the rad from outside th case, i had cooler temps on the cpu and the cae window felt cooler aswell

 

[CountMike]

It mattered to me because I was too close for comfort temperature wise, right up to throttling temps. If I had 10c+ margin I wouldn't have tried all that stuff. Even 1 - 2c gained by better TIM were in the play.