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Help with PWM atm please!!

post #1 of 26
Thread Starter 
I need to ask something about PWM control really quick. I am trying to change stock fans in my case and may get a new cpu cooler.

I was looking at some really good fans to put in my case to replace fans and also add to the case in the spots that need them.

http://www.directron.com/fnpx1215.html

http://www.directron.com/af12pwm.html

http://www.svc.com/cl2120p.html

and maybe http://www.mwave.com/mwave/SKUSear [...] 20with%204 (maybe the two front fans just in case they die out or something never know... but I like the blue leds and the stuff they have anyway, replacing two blue leds at the side of the case as it is >.< ).

Then there is this http://www.frozencpu.com/products/ [...] 03-45.html

There won't be any problems with the artic cooling fans and pwm control with using the gelid fans and what ever other fan I put in my case right?

I was thinking of getting two akasa flexa 5 way splitters, one for the cpu fan header and one for another four pin fan header located near the sata ports for other fans that may need pwm control (I heard it is not smart to put a lot of stuff on a single fan header, is that correct?) i may only have 3-4 fans on the cpu fan header never know... just to be safe or something lol.

I may not even need two of those if things go to plan, yeah and my case is mainly going to be air built. not to long ago this weekend I ordered the CM 212+ Evo Revision 2, thinking of grabbing some prolimitech pk1 to go with it ( my older thermal paste is missing supposedly donno how though).

I wonder what I am going to do with my CPU if I am going to overclock or not, I may not even have need to even try it. But i hear that heat sink is a beast for it's price, only if it was a silver arrow. I'll probably get one of those or a phanteks later on though.

I heard Sa can get near 16 degrees Celsius at idle or some such, do not know what is the difference between the phanteks and it but phanteks seems to be better for some reason it it may have to do with the degree difference?

my case is the lanboy air yellow, I want to replace the stock fans with pWM fans and add new fans also basically.

on another site I was told not to mess with the cpu fan header.. I only have two headers that are four pin.. the cpu fan header and sys fan_2 header are four pin. can't I put more than the heat sinks fans on the cpu fan header?
post #2 of 26
dont connect too many fans using y splitters to your mainboard headers. there is a limitation on how much amp/watts a header can handle.
please check your mainboard manual to make sure that you wont fry the header or even cause some serious damage.

Volt x Amp = Watt

to the fans, i used some of these arctic cooling f12 models and they are really loud on full speed.

rest is up to you.

i would recommend some TY-140´s, they are also pwm fans, very silent on fullspeed compared to other fans but perhaps not the perfect solution as case fans.

and also dont count on degrees that you read somewhere like you mentioned above (16°C)
there are several factors that are important as your ambient room temperature, the overall case airflow and the chip you are using (overclocked or stock)

a fan dont transform warm air into cold air, it just moves it while the ambient temp stays the same.

the 212+ is a very good choice cause its cheap (dunno about the evo version) but it wont catch up with high end coolers like the sa, the d14, the phantek or several others

if you still want to hook a lot of fans using y cables, then get a fan controller, there are a lot of models you can choose from and it wont matter if you control pwm fans from it either

hope it helps
Edited by justanewguy - 3/12/12 at 2:21pm
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post #3 of 26
Thread Starter 
the ty-140's you mentioned I can buy some and replace the stock fans on my heatsink with them, because while they 140mm they have 120mm fittings?

Ok since you said I can only stick about two fans on the cpu header, then I bet I can stick only three at the most. and seriously they are that loud? (af series I mean) http://www.newegg.com/Product/Product.aspx?Item=N82E16835186033&Tpk=FAN-AF12-PWM. I am wondering something about the A12's, and pretty much any artic cooling fans. If what you said was true...

Artic Cooling : Via the PWM signal, the CPU fan is controlled by the mainboard to reach the ideal temperature for the CPU. The PST (PWM Sharing Technology) is forwarding the PWM signal to all other fans inside the system. This way, all fans are spinning at the same speed. This provides silent operation in idle mode, but also gives sufficient performance, when required to offer efficient cooling.

Gelid: INTELLIGENT GELID PWM CONTROL
PWM (Pulse-width modulation) uses a digital signal to calculate and adjust to the appropriate cooling performance according to CPU and System temperature, without generating any heat during operation. Fan controlled by intelligent GELID PWM is more efficient than the traditional PWM fans.

That is why i have an eye on both the: GELID Solutions FN-PX12-15 120mm Case Fan with Intelligent PWM control (http://www.newegg.com/Product/Product.aspx?Item=N82E16835426015&Tpk=FN-PX12-15), and this http://www.newegg.com/Product/Product.aspx?Item=N82E16835186033&Tpk=FAN-AF12-PWM.


Would both of these PWM technologies cause conflict? Do they need to be on the CPU fan Header for this to go in effect? I am looking it and assumed they did have to be on the cpu fan header and would require me to have to add them to the 212 evo, which is what I ordered.

I might as well just stick on the ty-140's on the cpu heat sink (evo), and get more than two of one of the fans stated in the original post, and maybe the other fans I mentioned. The rest is up to me as you said, I just want to know if they have to be on the cpu fan header, and if so it is sort of messed up and I have to rethink this.


then there is this which I sort of want and maybe another from mwave.



http://www.svc.com/cl2120p.html

oh btw broken link:

http://www.frozencpu.com/products/13548/cab-464/Akasa_Flexa_FP5_PWM_5-Way_Splitter_-_Smart_Fan_Cable_AK-CBFA03-45.html
post #4 of 26
Why not just power the fans straight from the PSU? You can get 3 way and 4 way splitters that take power from a PSU's molex output and split 12V to 3, or 4, or as many fans as you want.... And then all you do is take the PWM signal from the motherboard's header and run it to the PWM pin on the fans that you want to control. When you're controlling PWM fans; the power always stays at 12V (your PSU can do that) and then the PWM circuitry in the fan takes the signal from the CPU Fan header and does super fast (On/Off) of the main power... the fan's motor is not capable of reacting to these fast signals so to "IT" it seems as the source voltage is being dropped and it slows down. biggrin.gif
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post #5 of 26
yes the TY-140´s have 120mm mountings.

i didnt said that you can only mount 2 fans on your fan header, i said that you need to check the mainboard manual, some can handle more while others are very limited.

i have the normal F12 version (non pwm fans) but they are exactly the same as the pwm version, just that these can get controlled by pulse.
there are 6 of them in my cm 690 and all of them are ticking, just super cheap fans and crap in my opinion.
if you dont mind an annoying ticking sound then go with them

never used a gelid product, i just read a lot (especially ehume´s thread where he tested lots of fans) and the Thermalright pwm fans are extremely nice, same goes to the noctua fans

to answer your question about the cpu fan header, if you like to use pwm, then you need to connect them to the 4pin header which is mostly the cpu fan header.
and you wont have any problems if you connect two fans on one header, every modern mainboard should be able to handle this small amount of power consumption. i was just concerned because you wrote up to 5 fans in your first post.

but wait for other replies, there are so many different fans and hundreds of reviews. perhaps someone else got another tip for a great pwm or case fan
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post #6 of 26
Thread Starter 
Quote:
Originally Posted by xXSebaSXx View Post

Why not just power the fans straight from the PSU? You can get 3 way and 4 way splitters that take power from a PSU's molex output and split 12V to 3, or 4, or as many fans as you want.... And then all you do is take the PWM signal from the motherboard's header and run it to the PWM pin on the fans that you want to control. When you're controlling PWM fans; the power always stays at 12V (your PSU can do that) and then the PWM circuitry in the fan takes the signal from the CPU Fan header and does super fast (On/Off) of the main power... the fan's motor is not capable of reacting to these fast signals so to "IT" it seems as the source voltage is being dropped and it slows down. biggrin.gif
Quote:
Originally Posted by justanewguy View Post

yes the TY-140´s have 120mm mountings.
i didnt said that you can only mount 2 fans on your fan header, i said that you need to check the mainboard manual, some can handle more while others are very limited.
i have the normal F12 version (non pwm fans) but they are exactly the same as the pwm version, just that these can get controlled by pulse.
there are 6 of them in my cm 690 and all of them are ticking, just super cheap fans and crap in my opinion.
if you dont mind an annoying ticking sound then go with them
never used a gelid product, i just read a lot (especially ehume´s thread where he tested lots of fans) and the Thermalright pwm fans are extremely nice, same goes to the noctua fans
to answer your question about the cpu fan header, if you like to use pwm, then you need to connect them to the 4pin header which is mostly the cpu fan header.
and you wont have any problems if you connect two fans on one header, every modern mainboard should be able to handle this small amount of power consumption. i was just concerned because you wrote up to 5 fans in your first post.
but wait for other replies, there are so many different fans and hundreds of reviews. perhaps someone else got another tip for a great pwm or case fan

There is two four pin headers. The CPU Fan header which you/I mentioned, then there is the SyS_FAN2 fan header which is four pin, the other two are three pin. Ok so the problem you mentioned was the fact that I stated I wanted to put all five on one fan header? Yeah I am not that dumb I know every well I would fry the fan header completely or worse! I know two would be the best bet, but I have a feeling I can add three to it, if I were to add a third one i'd probably make it the rear fan. So I would need a 3 way splitter that connects to the header that is four pin pwm and that also connects to the power supply like the akaska or I can just used the akaska anyway.

The side fans are being replaced with pwm fans, and so is the rear fan, the top fans may be getting x2 pwm, and i'll be getting two ty-140's. that is all I need atm ^^. I mainly am worried about the splitters and power consumption, so I know the motherboard will have no issues so this is not the problem but I will reread the manual just in case..


I may need the poster above you advice though. I may only want to stick two fans or three on the second splitter. that includes rear and sides if the rear should not go on the cpu fan header... that leaves the top fans. to worry about. So i wonder what molex cable they were speaking about and i'll handle the rest.
post #7 of 26
Thread Starter 
Quote:
Originally Posted by xXSebaSXx View Post

Why not just power the fans straight from the PSU? You can get 3 way and 4 way splitters that take power from a PSU's molex output and split 12V to 3, or 4, or as many fans as you want.... And then all you do is take the PWM signal from the motherboard's header and run it to the PWM pin on the fans that you want to control. When you're controlling PWM fans; the power always stays at 12V (your PSU can do that) and then the PWM circuitry in the fan takes the signal from the CPU Fan header and does super fast (On/Off) of the main power... the fan's motor is not capable of reacting to these fast signals so to "IT" it seems as the source voltage is being dropped and it slows down. biggrin.gif

What is it exactly you were speaking about? how would this be set up and would it include not touching any stock fans at all, what product would help with being a molex connection like this? Just want to know, or get a better explanation. I am not computer illiterate it is just that i do not know much about pwm, and setting stuff up have never done all this, most was usually molex and stuff in my builds and people I have built stuff for, what if I need to do something for someone in the future?
post #8 of 26
there are y cables that can be connected to the pwm header to use the signal but are also connected with a molex to get the power directly from the psu.
so you are able to use the pwm signal only

or just check the mainboard manual, perhaps you can hook up 4 fans on one header without any problems (12W probably / 1 Amp)
Edited by justanewguy - 3/12/12 at 4:21pm
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post #9 of 26
This is all you need to safely run several PWM fans. Power for fans comes from the PSU, receive signal from the CPU fan header - Akasa PWM Smart Fan Cable

cab-183.jpg

Just to note, you should double check that Sys_Fan2 fan header is really PWM, as I suspect it's actually voltage controlled and is tied to the CPU fan header.
post #10 of 26
Thread Starter 
Quote:
Originally Posted by justanewguy View Post

there are y cables that can be connected to the pwm header to use the signal but are also connected with a molex to get the power directly from the psu.
so you are able to use the pwm signal only
or just check the mainboard manual, perhaps you can hook up 4 fans on one header without any problems (12W probably / 1 Amp)


I see so I was recommended to try and this, and mainly use four pin molex for my fans and such? because I would get the signal xD? I am fine with trying out splitters like the akaska five way, and i may check the manual now.

i'll respond back and look at other posts when they come. ty for all posting you all have been a lot of help smile.gif.
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