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Recommend me a pair of 120mm PWM case fans. - Page 8

post #71 of 103
Thread Starter 
Quote:
Originally Posted by akromatic View Post

on a budget i'd recommend arctic cooling fans but if you got money to burn then noisblockers

No money to burn, like, at all. When I stack up the price of a few fans I feel like I might as well go for a Define Mini...

£20 for ONE Noiseblocker is a bit painful, like. As for the Arctic Cooling, are you on about the F2?

Also, anyone here know if Bitfenix Spectre and/or Pro are good as case fans, or are they "Corsair" tier?
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post #72 of 103
definitely F12, 6year warranty and fluid bearing, cant go wrong
post #73 of 103
Thread Starter 
Upon reading (I know I don't have to get PWM but I can't help but look) further the PWM version seems to suffer clicking at speeds below 100%...

IS THERE NO PERFECT FAN.
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post #74 of 103
well as long as you run PWM fans on PWM hand headers/controllers you should not experience the clicks. run them on a voltage controlled header and you are just destroying your fans and making them click.

go double check your fan reviews if they are using voltage to control them making them click or using a proper PWM fan header

remember PWM fans dont like running on less then 12v and are controlled by pulses of 12v based on duty cycles which gives them full torque even at low speed rather then normal fans that are slowed by running less voltage which below certain voltages would not have enough power to push the fan blades to move
post #75 of 103
F12 is not FDB bearing, same goes with bitfenix fans. just an FYI

the F12 has a good price though and perform decent!
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post #76 of 103
Quote:
Originally Posted by Dyaems View Post

F12 is not FDB bearing, same goes with bitfenix fans. just an FYI

the F12 has a good price though and perform decent!

i'm pretty sure they are fluid bearings, i have a set of them which are.

http://www.arctic.ac/worldwide_en/products/cooling/case-fan/arctic-f12-pwm-co.html
http://www.arctic.ac/worldwide_en/products/cooling/case-fan/arctic-f12-676.html

well maybe its the new CO version that isnt as their page is ambiguous but the standard F12 with PWM are fluid, and they are definitely good bang for buck fans and really good sound profile too. abit under rated though
post #77 of 103
Quote:
Originally Posted by doyll View Post

Library quote?
So either we have a complete breakdown in communication or you do not see any difference between a DC power source powering 10 fans and a RPM signal from Phanteks hub from a fan to MoBo.. but no "DC signal". tongue.gif

I really don't know what you want ..... What to you do when the Department of Motor Vehicles sends you your registration renewal .... do you argue with them, act like you have no idea what they are talking about and insist you don't own a "motor" vehicle, that your car has an "engine" in it and wait for a form from the Department of Engine Driven Vehicles ? ..... I don't see as it matters whether one says motor or engine when 99.9% of the vehicle owners understands what their vehicle registration is for.

I offered you the correction to the original statement but that wasn't enough. I don't see whether it matters which way the signal travels in a loop, the point is, w/o it doesn't work .... without it, you don't have a "control loop" and you don't have rpm readings.....emphasis on the word "loop" ....in order for the control loop to properly function, according to the published reference, you need ......:
Quote:
The tach signal, when driven by a dc voltage[/QUOT E]

The library reference uses the word signal, my industry uses the word signal, the catalogs use the word signal....if you don't like it don't use it. People, industries, cultures use different words for the same thing, the important thing is we manage to understand the meaning of the words without wasting time with potato / potahto, tomato / tomahto, pyjamas / pyjahmas or which feeds what in a circular loop...... it's a loop ! Break the circle and it doesn't work.

.... It's like arguing that pump flow doesn't "go to" the reservoir it "comes from" the reservoir . You keep saying it's not a DC signal but the reference very clearly says the tach signal is driven by a DC voltage.... and I think good enuff for most people to understand it's the tach signal and dc voltage controlling the speed and not PWM. If you have an issue with it their description of it, and the way it is commonly used, the only thing I can suggest is to take it up with them and IEEE.
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post #78 of 103
O_O dont understand the argument you guys having

3 pin headers

+ve , -ve , RPM tach

tach uses fan feed back pluses to determine fan speed.

4 pin headers have an additional PWM signal that is sent to the fan

DC pulses are not the same as alternating current

fan speed control is not dependent on the tach feedback, you can still set fan profiles to speed fan up or slow them down based on other information. the RPM signal only tells you how fast the fan is actually spinning rather then assuming its spinning faster.

as to whether the fan is controlled via varying voltages or pulses of DC that would depend on the fan type and the header used
post #79 of 103
Quote:
Originally Posted by JackNaylorPE View Post

Quote:
Originally Posted by doyll View Post

Library quote?
So either we have a complete breakdown in communication or you do not see any difference between a DC power source powering 10 fans and a RPM signal from Phanteks hub from a fan to MoBo.. but no "DC signal". tongue.gif

I really don't know what you want ..... What to you do when the Department of Motor Vehicles sends you your registration renewal .... do you argue with them, act like you have no idea what they are talking about and insist you don't own a "motor" vehicle, that your car has an "engine" in it and wait for a form from the Department of Engine Driven Vehicles ? ..... I don't see as it matters whether one says motor or engine when 99.9% of the vehicle owners understands what their vehicle registration is for.

I offered you the correction to the original statement but that wasn't enough. I don't see whether it matters which way the signal travels in a loop, the point is, w/o it doesn't work .... without it, you don't have a "control loop" and you don't have rpm readings.....emphasis on the word "loop" ....in order for the control loop to properly function, according to the published reference, you need ......:
Quote:
The tach signal, when driven by a dc voltage[/QUOT E]

The library reference uses the word signal, my industry uses the word signal, the catalogs use the word signal....if you don't like it don't use it. People, industries, cultures use different words for the same thing, the important thing is we manage to understand the meaning of the words without wasting time with potato / potahto, tomato / tomahto, pyjamas / pyjahmas or which feeds what in a circular loop...... it's a loop ! Break the circle and it doesn't work.

.... It's like arguing that pump flow doesn't "go to" the reservoir it "comes from" the reservoir . You keep saying it's not a DC signal but the reference very clearly says the tach signal is driven by a DC voltage.... and I think good enuff for most people to understand it's the tach signal and dc voltage controlling the speed and not PWM..
This has nothing to do with "motor" and engine"
You keep throwing "Tach signal", "control loop", "library reference", and now "tach signal is driven by DC voltage"...
The library reference you quote: "tach signal is driven by DC voltage" is not a "DC signal"... any more than it is a "tach voltage"

DC = direct current = a continuous electric current flowing in one direction.
Signal = a function that conveys information
We can have DC powered signals... but that is not a DC signal.

There is no "DC signal" going to the Phanteks hub from your MoBo fan header.. It is DC voltage. There is a tach signal coming from fan motor to your MoBo fan header.. it is not a DC signal.

Tach signal is tach receiving a signal

DC signal is not direct current receiving a signal.

Direct current / signal has no similarity to "engine / motor" or "potato / potahto, tomato / tomahto, pyjamas / pyjahmas".

As I see it you made a simple mistake when you wrote:
"I am running 10 DC fans off the Phanteks Fan Hub with one DC signal from the MoBo."
I think you were saying that you are powering 10 fans with DC voltage on the Phanteks fan hub supplied from your motherboard fan hub.

That is what I have been trying to find out.. and if you are able to adjust the fan speed using variable voltage control from MoBo header. thumb.gif
Edited by doyll - 1/13/14 at 4:49am
post #80 of 103
Quote:
Originally Posted by akromatic View Post

O_O dont understand the argument you guys having

3 pin headers

+ve , -ve , RPM tach
Warning: Spoiler! (Click to show)
tach uses fan feed back pluses to determine fan speed.

4 pin headers have an additional PWM signal that is sent to the fan

DC pulses are not the same as alternating current

fan speed control is not dependent on the tach feedback, you can still set fan profiles to speed fan up or slow them down based on other information. the RPM signal only tells you how fast the fan is actually spinning rather then assuming its spinning faster.

as to whether the fan is controlled via varying voltages or pulses of DC that would depend on the fan type and the header used
Discussion is about the definition of "DC signal" versus "DC" power/current and "signal" like PWM & RPM "signal"
You reversed the +ve & -ve
+ve = 12VDC; -ve - GND; PWM signal = Control
[


I agree with the rest. thumb.gif
Edited by doyll - 1/13/14 at 4:38am
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