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post #2051 of 3060
Quote:
Originally Posted by LostParticle View Post

Uhm...yeah.. I was referring to intake case fans..


One question:

Do you happen to know a 120 mm fan with better specifications than the following?

Noctua NF-S12A (PWM):
Rotational Speed (+/- 10%) : 1200 RPM
Airflow : 107,5 m³/h
Static Pressure : 1,19 mm H2O
Acoustical Noise : 17,8 dB(A)
Yeap, and... I do not understand your reaction...?...?
All I did was to say how and why I prefer to use (the specific) 120 mm fans as front intakes in my system.
The specifications mean very little. To know how a fan performs we need to see it's P-Q curve.
The are airflow is in open area. Only time I use a fan like that is circulating to cool of in hot weather. tongue.gif
Static pressure is the level that fan stops moving air. I have no use of a fan that isn't moving air.rolleyes.gif
Noise level is taken when fan is running in open space. As I said, only used that way in hot weather. wink.gif

Now here is the P-Q curve showing what it really does and P-Q curve of NF-S12A below it to scale. notice the difference in airflow at mm H2O of second group of fans compared to first. Keep in mind this is only their airflow, so don't forget we need to consider their noise level as well. That data is in the Coolingtechnique reviews. They have e good data base compiled
http://www.coolingtechnique.com/recensioni/air-cooling/ventole.html



Reply to 120 vs 140mm fan area was because you agreed with Depauville Kid's single dimensional area. biggrin.gif
Edited by doyll - 9/21/15 at 5:18am
post #2052 of 3060
Quote:
Originally Posted by LostParticle View Post

Well, I don't know how it sounded but if you will read again my post #2039 you will realize that all I wish to say is that as I currently have my three Noctua 120 mm fans mounted on the front panel of my chassis they seem to cover more area than two 140 mm fans, if I would mount them. They appear like they do so. That is all I have tried to express, perhaps in a wrong manner since English is not my native tongue.

When it comes to all the other information you have provided, the so called P-Q diagrams and the rest, I will be honest with you: I do not fully understand them. I need to study them, and read further, other things as well, to fully understand what they mean. IF, and I say IF, I would be in the need to purchase new fans right now - and I am not in such a need - do you know what I would do? I would purchase two or three different brands (models) of, let's say, 120 mm fans - after reading some reviews and ask around - and I would test them in my environment and system. The best I would keep, the rest I would return or sell. Most probably, return them.

Right now, in order to improve a bit or get the best from the fans I already own, all shown in my sig_rig, two thing I can try, only:
a) test / use my system without the front grill of my Air 540 - but with the filter always on, of course.
b) place one or two of my 140 mm fans at the bottom and raise the chassis by placing it on some wooden cubes I happen to have. It is compulsory for me to have my SSDs at the bottom, so the fans will stand on top of them. So, I'm not sure IF I will achieve anything significant, at least my GPU will benefit, however. With the cost of the additional dust because I don't have a filter for the bottom area.

Finally, you usually suggest the removal of those "grills", or whatever they are called, of the PCI devices... I haven't bothered with that because when I put my hand at the rear side of my case the airflow there is barely noticeable.

Thank you.
Yeah, 3x 120 fans stack up taller than 2x 140 fans. biggrin.gif This whole ting about fan area was a joking rant about how the airflow area was being calculated totally wrong. I was not intentionally offending anyone. Just joking pounting out that 240 vs 36omm is not the area and later the 120x360 and 140x280mm are are far4 from what the area a fan is. thumb.gif

Are your temps a problem now?

Case airflow is not so much how many fans are in use, but about the case flowing cool air to components while flowing the components heated exhaust out of case without it mixing (and heating up) the cool air. This means case must always for as much or more air than components. Usually 1.2-1.5x more case airflow is needed to keep cool air going to components, but it also requires have fans positioned so air flows where we not it to. It is very hard to keep air flowing where we want it when the component fans are changing speed depending on load/heat generated while case fans are running at fixed speed. The changing component fan speed means contant speed cases fans need to run much faster than needed most of the time .. because they need to be moving more air than components do at full speed. This makes the case noisy all the time. But if case fans change speed like the component fans, they will be idling like the component fans are most of the time and system will be quiet. wink.gif
post #2053 of 3060
I love my new d15s biggrin.gif and after the installation I think all air cooling manufacturers should just sit down and take notes cause this is how you make the installation perfect down to the last detail. I had TR Macho and while it was a great cooler it's nowhere near Noctua. It used to slide all over the IHS until you screwed it, had to hold it at the same time to land on the CPU at a straight angle and not skew, the fan clip was mediocre compared to d15s and I actually had to hold the bolts behind the mobo while screwing in the standoffs since there's no backplate, not to mention one with pre-installed bolts like d15s has. Plus I'm running 15 degrees cooler on d15s now biggrin.gif
Edited by Klocek001 - 9/21/15 at 8:33am
post #2054 of 3060
Quote:
Originally Posted by Depauville Kid View Post
 
Quote:
Originally Posted by LostParticle View Post

Yeap, 3 x 120 mm cover more area than 2 x 140 mm. This is why I use them, and I have tested the temperature both on my previous AMD system and on my Intel system, both with 2 x 140 and 3 x 120, front intakes, and 3 x 120 perform better. In addition, on this specific case one cannot put 140 mm fans on the front panel, because he/she will hear an airplane turbine noise from 1300 RPM and above (I think).

What was sad for me to discover was that I "cannot" place even the 120 mm Industrial Noctua fans at the front panel of this chassis. Because, oh my God how loud - very loud they sound, even from 1000 - 1100 RPM and above! Too unfortunate but also expected since the smaller the fan the louder it becomes on high RPM. Or I think so...

I had wicked turbine noise on my case, not because of the fan speed, but due to the intake vents. I cut them all out and voila, no more noise. The vent covers hide my hack job.



You're halfway there. Now delete the rear grill. You probably can vent the case with the Bernoulli principle. Better: remove the rear grill, put the second P14 on the back of the D14 as a pull fan -- just ask Noctua for another set of fan clips (send them a copy of your original receipt). Every thing will be even quieter.

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post #2055 of 3060
Quote:
Originally Posted by doyll View Post

Yeah, 3x 120 fans stack up taller than 2x 140 fans. biggrin.gif This whole ting about fan area was a joking rant about how the airflow area was being calculated totally wrong. I was not intentionally offending anyone. Just joking pounting out that 240 vs 36omm is not the area and later the 120x360 and 140x280mm are are far4 from what the area a fan is. thumb.gif

Are your temps a problem now?

Case airflow is not so much how many fans are in use, but about the case flowing cool air to components while flowing the components heated exhaust out of case without it mixing (and heating up) the cool air. This means case must always for as much or more air than components. Usually 1.2-1.5x more case airflow is needed to keep cool air going to components, but it also requires have fans positioned so air flows where we not it to. It is very hard to keep air flowing where we want it when the component fans are changing speed depending on load/heat generated while case fans are running at fixed speed. The changing component fan speed means contant speed cases fans need to run much faster than needed most of the time .. because they need to be moving more air than components do at full speed. This makes the case noisy all the time. But if case fans change speed like the component fans, they will be idling like the component fans are most of the time and system will be quiet. wink.gif

Thank you very much, I appreciate your input smile.gif
    
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post #2056 of 3060
Well my A14 PWM's finally came in and I installed them. I tell you what, this machine is dead silent at idle lmao. The idle temps did increase by 1-2 degrees but its dead quiet so im fine with it. 100% load on CPU it doesnt even break 47 degrees. I do have a question though, I am actually considering an external fan controller and am wondering what are some good ones to get?





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post #2057 of 3060
Quote:
Originally Posted by xXx1990 View Post

Well my A14 PWM's finally came in and I installed them. I tell you what, this machine is dead silent at idle lmao. The idle temps did increase by 1-2 degrees but its dead quiet so im fine with it. 100% load on CPU it doesnt even break 47 degrees. I do have a question though, I am actually considering an external fan controller and am wondering what are some good ones to get?





With load temps like 47c why do you want a external controller. tongue.gif
post #2058 of 3060
Yes load temps on the CPU are 47.. But the other temps are not lol, The fan controller would be for the case fans. Now im wondering can I use 2 Y 4pin splitter cables together to connect all 3 case fans to one PWM header on the mobo so I can control them all together or no? Because if I can do that then im fine with not having an external fan controller since my board technically only has one PWM header and the other one is the CPU PWM header which is controlled simultaneously with the CPU fan.
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post #2059 of 3060
Motherboard fan connectors usually are rated up to 12V/1A, some are even 12V/2A. I quickly skimmed through your motherboard manual but didn't see any mention of the amperage rating.
The NF-A14's you have are rated to 0.13A. Multiply that by the number of fans you have and voila.. 0.13*3=0,39A. Basically yes, you can go ahead and run all three of those off of one motherboard PWM header.
If it's 1A header you could basically run seven of those NF-A14 PWM's off of one 1A header.
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post #2060 of 3060
Quote:
Originally Posted by lagittaja View Post

Motherboard fan connectors usually are rated up to 12V/1A, some are even 12V/2A. I quickly skimmed through your motherboard manual but didn't see any mention of the amperage rating.
The NF-A14's you have are rated to 0.13A. Multiply that by the number of fans you have and voila.. 0.13*3=0,39A. Basically yes, you can go ahead and run all three of those off of one motherboard PWM header.
If it's 1A header you could basically run seven of those NF-A14 PWM's off of one 1A header.

And when in doubt, you can contact tech support for your board. I had to do that to discover the Amp limit (1A) on my Gigabyte P55A board (My contemporaneous As.s had a limit of 2a).

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