Which push/pull fan to use on H50-1

Serenityxo

Serenityxo

Serenityxo

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I apologise for 'yet another H50-1' thread but I've been reading them all and still can't come to a decision on what fan to use, so I made a poll out of the 2 most people say to use.

Which one would you go for? (Price doesn't come into the equation, rather performance whilst being quiet).

It would also seem I cannot make a poll here so post your option and I'll go by that.

Akasa AK-FN059 120mm Ultra Quiet Viper Cool Fan

or

Akasa AK-FN058 Apache Black Super Silent 120mm Fan

I'll be using the Akasa PWM Fan Splitter Cable to connect them up so they're in sync RPM wise.

Many thanks.
 
Don't use the PWM Splitter, Viper PWM, Apache keep at max rpm, they won't sync > Viper 600 - 1900rpm push > Apache 600 - 1300rpm pull, fan's have to be the same!!! :)
 
Why not use the PWM Splitter? I would have thought having 2 fans at close to identical RPM is better than 2 fans at 2 different RPM's (which I have at the moment)?
 
There is 600rpm difference wouldn't call that close!!!! :(

You want the best performence from the Viper[push] so set that to PWM by it self, but have it your own way.

Been running H50x1 Viper[push]:1 Apache[pull] my self for a good while now..;)
 
with the pwm splitter the fans would be running at the same voltage not the same rpm as being different types of fan they have different rpm's at any given voltage.
 
I don't want to come across as an ass here, never used watercooled before so I'm just looking for opinions as mine may be wrong.

I would have just thought that 2 fans at the same rpm is better than 2 at different speeds, I may be wrong.

chipps101 said:
with the pwm splitter the fans would be running at the same voltage not the same rpm as being different types of fan they have different rpm's at any given voltage.
Click to expand...

I know this, that's why I'm looking to get 2 of the SAME fan, not mixed, so the rpm's would be the same. Which would seem the better option rather than 2 different rpm's.
 
the ideal situation is two fans running at identical speeds, and moving the same volume of air per second. If the two fans are at different speeds, but same volume of air, the interaction between the air and the fans will be far more turbulent (reducing total airflow). If the two fans are at the same speed, but moving different volumes of air, the fans will be doing work on each other, thus reducing the work done on the air. If both the flow rate and speeds of the fans are different, both of theses effects will come into play.

This can be shown using fluid dynamics (although, not by me).
 
Lleot > Has anyone actually proved that two different speed fans makes a difference?

The fan set at pull just cool's that side of the rad, depending on the fan you use, you only get about 2 > 6 degree's better cooling. So the only way you can improve your temp's is use a better performing fan set at push.

I went from H50+2xApaches CPU at 4.0GHz to H50x1 Viper:1x Apache now l can use my CPU at 4.2GHz especialy in this hot weather, because the 2xApaches could not cool my CPU AT 4.2GHz good enough > high temp's.

You can draw your own conclusion!!!!!!!

God help me, trying to help some one, its like pulling your teeth out. Its a good job mine are false, out in one go, painless thank God!!!!. :D

wilko49 > I'v just kicked your fluid dynamics into touch.
 
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Read this review > Radiator-Fan-Orientation-And-Shroud-Testing.

http://martin.skinneelabs.com/Radiator-Fan-Orientation-And-Shroud-Testing-Review.html

From the review -

Two fans Push/Pull vs others - It was very clear that when using two fans per radiator section, that the radiator intself acts as a flow spreader and provided great benefit to straightening out the air for the second fan in a push/pull configuration. Just like doubling up with a pump, there is a pressure benefit to doubling up on fans and this translates to about a 20-30% performance gain. The added fan pressure simply means and added gain in air flow and corresponding performance. None of the experimental pull/pull or push/push configurations provided any noteworthy benefit as it seams the air is simply too disturbed from the first fan to allow the second to perform properly when air is moving. I would always recommend a push/pull configuration for two fans and add a shroud to both sides if space allows.
 
I personally use 2 vipers with the pwm splitter, on my PA120.2 in pull config, as my rad is in my drive bay, so it pulls in cool air from the front of the case (cm590) through the rad and off into the case. But then again my rad is thick and the fins are not so densely packed as the corsairs, so thats where push may be a lot better.

Im still to test if having them push instead of pulling will make a diff, im abit to lazy to test, as means unmounting the rad to do so, and if it aint broke don't touch i say lol.

But outa the 2 you listed, the viper is the better fan.

But Oldphart has tested the faster push fan quite abit and it does seem to work better, on those thin rads. So he is'nt just saying it, he has tested it.
 
Yeh iv read that site ages ago, i am actully thinking of getting some shrouds for my Pa120.2 as that may help a lot more, especially around the dead spot from the fan (fans center).

But yeh that is a good read for those new to water cooling.
 
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