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post #5971 of 20732
Quote:
Originally Posted by gdubc View Post

Not according to Raja at Asus. I have a z77deluxe that is supposed to be all pwm headers as well as a max v formula which has, according to the manual, cha_1,2,3 voltage controlled and cpu, cpu_opt, and opt_1,2,3 pwm controlled. However, others have found that only cpu/cpu_opt are pwm and I pmd Raja, the Asus rep for North America and he confirmed all Asus motherboards use voltage control for all headers other than cpu/cpu_opt. Very disappointing, I know. I was pissed to say the least to be told by Asus themselves that the manuals are wrong.

If you have other information though I am always up to hear more, as it just doesn't make sense that they market them as having pwm and it just doesn't seem right that they don't.

Im pretty sure that guy at Asus that you talked to is wrong. They can't just say the wrong information in every manual for every Asus boards. That is like the biggest marketing false information.

If you can ask JJ from Asus, then he might tell you the truth.
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post #5972 of 20732
Quote:
Originally Posted by gdubc View Post

Not according to Raja at Asus. I have a z77deluxe that is supposed to be all pwm headers as well as a max v formula which has, according to the manual, cha_1,2,3 voltage controlled and cpu, cpu_opt, and opt_1,2,3 pwm controlled. However, others have found that only cpu/cpu_opt are pwm and I pmd Raja, the Asus rep for North America and he confirmed all Asus motherboards use voltage control for all headers other than cpu/cpu_opt. Very disappointing, I know. I was pissed to say the least to be told by Asus themselves that the manuals are wrong.

If you have other information though I am always up to hear more, as it just doesn't make sense that they market them as having pwm and it just doesn't seem right that they don't.

If that information is correct I am pissed too. From the manual of the RIVE looks like not only cpu and cpu_opt but several other headers have the pwm signal....KInd of make sense since the own asus fanxpert does not allow control of all the headers in the RIVE, only 2 (since cpu_opt just follows the cpu header).
post #5973 of 20732
That information is not correct. Maybe for some other asus boards, but on my crosshair V formula Z it isnt correct. All fan headers have the capability of being pwm controlled, even the "optional". With that said, if you have a voltage controlled fan connected to a chassis fan header, as well as a PWM fan connected to the chassis fan header, both fans will be PWM controlled. You can't control the voltage fan via pwm, so it controls it by voltage. I have tested this.
post #5974 of 20732
In my own testing, I can confirm that the 4 pin header that is between the IO ports and the PCIE slots is NOT PWM controlled despite it being a 4 pin.

You guys should try it for yourself. Connect the PWM splitter to that header and see if the PWM fans connected to the splitter change speed.

In my testing, PWM fans connected to the PWM splitter that is connected to the 4 pin in that area do not respond to speed changes. But if I plug in a 3 pin fan on that header, it changes speed. I would not be surprised if other Asus boards are the same way. You cant necessarily go by the physical appearance. There is also no setting in the BIOS for that particular header to switch between PWM and Voltage. You can only designate a desired fan speed IIRC.

You wont be able to tell that a PWM fan on a "4 pin" voltage enabled header is controlled via PWM because, well you're still modulating the actual power going to it. One cannot simply make a determination by plugging in a Voltage fan and a PWM fan directly to the 4 pin header to determine its modes of operation. Both types of fans will appear to respond to Voltage. Use the splitter to determine that, since it relies on only the PWM signal to change speeds.

that being said, use the splitter and the pump together at least to avoid issues. If your pump shuts down during idle, chances are you have it plugged into a voltage header. It should be always on.

For those that want to know how to adjust speeds, this is one way:
Edited by ez12a - 8/18/13 at 10:37am
 
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post #5975 of 20732
At least for my P8Z77 board, there is actually an errata on the ASUS web site, that points out that the 4-pin fan headers are not true PWM, they are a hybrid to support both 3 and 4 pin fans. The errata specifies only the cpu-fan headers are "true" PWM. This is official documentation. As was mentioned above, the splitter definitely highlights this.
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post #5976 of 20732
Quote:
Originally Posted by ez12a View Post

In my own testing, I can confirm that the 4 pin header that is between the IO ports and the PCIE slots is NOT PWM controlled despite it being a 4 pin.

You guys should try it for yourself. Connect the PWM splitter to that header and see if the PWM fans connected to the splitter change speed.

In my testing, PWM fans connected to the PWM splitter that is connected to the 4 pin in that area do not respond to speed changes. But if I plug in a 3 pin fan on that header, it changes speed. I would not be surprised if other Asus boards are the same way. You cant necessarily go by the physical appearance. There is also no setting in the BIOS for that particular header to switch between PWM and Voltage. You can only designate a desired fan speed IIRC.

You wont be able to tell that a PWM fan on a "4 pin" voltage enabled header is controlled via PWM because, well you're still modulating the actual power going to it. One cannot simply make a determination by plugging in a Voltage fan and a PWM fan directly to the 4 pin header to determine its modes of operation. Both types of fans will appear to respond to Voltage. Use the splitter to determine that, since it relies on only the PWM signal to change speeds.

that being said, use the splitter and the pump together at least to avoid issues.

For those that want to know how to adjust speeds, this is one way:

It is only PWM controlled if you have a temp probe connected to the corresponding header. Then in the bios you can select the temp range for it to control.
post #5977 of 20732
Thread Starter 
Quote:
Originally Posted by bond32 View Post

That information is not correct. Maybe for some other asus boards, but on my crosshair V formula Z it isnt correct. All fan headers have the capability of being pwm controlled, even the "optional". With that said, if you have a voltage controlled fan connected to a chassis fan header, as well as a PWM fan connected to the chassis fan header, both fans will be PWM controlled. You can't control the voltage fan via pwm, so it controls it by voltage. I have tested this.

A voltage fan cannot be controlled by pwm, even if it's hooked up with another fan that is pwm as you mention above. A non-pwm fan will always run 100% if there's an attempt to modulate it with pwm, since pwm devices always receive 12v. But a pwm device will still slow down with a voltage drop, but usually much more drastically and it will damage the unit in an unknown amount of time.
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post #5978 of 20732
Sorry if this has been talked about earlier in the Thread.

3770k OC to 4.4, 2x 7970 CF T 1100Mhz in a Fractal R4

trying to decide between H220 | H20-x20 | MCR-x20
In any of the choices I will add a 280.2 or 240.2 radiator to add cooling capacity

Looking for simple...coming from H100 on CPU and a fried 7970 from a Dwood bracket.

Will H220 drive all 3 blocks? (cpu and 2x full 7970 plates)

Thanks all.
post #5979 of 20732
Quote:
Originally Posted by bond32 View Post

It is only PWM controlled if you have a temp probe connected to the corresponding header. Then in the bios you can select the temp range for it to control.


at least according to the manual for my p8z68, the 4 pin header pinout that doesnt work is supplied a 5+v on the 4th pin.

Unlike the CPU and CPU OPT pinout that has a "CPU FAN PWM" on the 4th pin.

Take it for what you will. My point still stands, any fan will respond to a 4 pin voltage controlled header. The only way that different modes can be determined is by using the PWM splitter.

edit: for bond's particular mobo, it does have PWM capability according to the pinout. My mistake. My motherboard is low end tongue.gif
Edited by ez12a - 8/18/13 at 10:49am
 
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post #5980 of 20732
That is correct.

Here you go. Chassis fan 3 has 3 corsaid sp120's all voltage controlled, Chassis fan 1 has one swiftech helix fan connected. This shows that the board still knows the difference between the two and controls them accordingly, unless of course the swiftech is simply being voltage controlled as well.
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