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Asrock Bios fan control is it equal on all models
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11mail22 View Drop Down
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    Posted: 26 Nov 2016 at 6:51pm
Here my story about FAN control on the ASRock Z170 Gaming K4 board.
First of all I want to mention in this thermal thread, that I am glad to decide for Gaming K4 instead of MSI Tomahawk, as the 45% larger Z170 heat sink is valuable. This device is really a heater. But back to FAN control.
My Miditower has 5 DC controlled Fans, but the board just have two ports to control that (CPU_FAN1 and CHA_FAN1), as ASRock decided to save some cents (which MSI does not). The layout is prepared for each port, but the FAN voltage regulator device for this 3pin mode is just mounted at two of them. My thought was to connect two FANs in parallel to one FAN port of the mobo.
So I measured the power consumption of a single 12cm fan:
0.13mA@12V, 0.11A@10V, 0,09A@8V, 0,07A@6V  Startup: 5V

The FAN voltage regulator device is a Nuvoto 3943S which is similar to http://www.nuvoton.com/hq/products/power-management/voltage-regulators/fan-driver-ic-series/%3F__locale=en confirmed by customer support of Nuvoto (Thank you for that).

This is the important information in this datasheet (beside the 500mA drive capability)
PD(MAX) = (TJ(MAX) - TA) / θJA Where TJ(MAX) is the maximum operation junction temperature 125?? TA is the ambient temperature and the θJA is the junction to ambient thermal resistance. θJA for ESOP-8 package is 75??W on JEDEC51-7 (4 layers, 2S2P) thermal test board with minimum copper area. The maximum power dissipation at TA = 25??can be calculated as: PD(MAX) = (125??- 25?? / 75??W = 1.33W

As slower the fan should run, as more power will be converted to heat in this device (MOSFET). dP = dV*I.
For my parallel FANs this result in (12V-6V)*2*0,07A = 0.84W so it will work. In practice this small device, which is well thermal connected to the board (look at the spare foot prints), get really warm. You cant put your small finger longer time on that. So ~60°C.
So keep in mind, lower speed is more critcal for you board.
 
If you have similar thoughts please check your fans carefully. My lighted top FANs does have 0.08A@5V (startup 3V), which already lead to the maximum of 1.33W of the device. 
Finally I put the back fan to CPU1_FAN and both front fans in parallel to CHA1_FAN. The two lighted top fans are in serial (2x6V) direct to 12V.

My only PWM fan (4 pole) is the Arctic Freezer 13. Connected to CPU2_FAN, but at lower speed I got strange buzzing noises. I tried CHA4_FAN and this works absolutely silent. No idea what generated this sound, may be a wrong PWM signal to the fan or a coil of the 12V on board power supply (but guess the 12V for the FAN is comming directly from main power supply). 

The controlling in the BIOS or App is customized. Only in this mode you know what happen and can perfectly adapted to your FANs noise profile. It can be done very accurate by single % steps, which already changes the noise behavior of the fan.

ASRock should really spent at each port that 3pin option, as MSI do.


Edited by 11mail22 - 28 Nov 2016 at 1:57am
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outlawzgr View Drop Down
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I 've got also a question regarding the uefi fantastic tuning, 
I've the h170 fatal1ty hyper board with pwm headers and also pwm fans, but the fans wont go lower than half their speed, i set them to 0% rpm in uefi,  all of them,  and all of them run at 30-50%,  i want them.to stop when cpu temp is bellow 60c but i can't see that happening even if i adjust the fan curve to be 0% until cpu reaches 80c, the fans spin no matter what,
Speedfan does not work with the board so i am stuck with the noise that the fans make at 50% and i have 7 so it will be nice i could make them stop or at least if i can adjust the board to provide 5 or 7 volts instead of 12 to lower their rpm values

Is there any way to make the stop? Or make them go to lower rpm value?
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Ok, thanks for the quick reply Xaltar.
i5-6500/H170Pro4S/16GB HyperX Black DDR4
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Xaltar View Drop Down
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H, H stands for High. This will allow the motherboard to slow it down when necessary and have access to the fan's full speed when needed.
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Hi All,
 
I'm about to build using ASRock H170Pro4S and had question with the fan speed control. I'll be using (correct if I'm wrong) CHA_FAN1 for the front fan; my question is with the fan there is a three place switch attached to the fan (L,M,H) which do I leave the manual switch to in order to let the BIOS and mobo control the full range of fan speed?
 
Thanks!
i5-6500/H170Pro4S/16GB HyperX Black DDR4
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Hi,
I just bought AsRock Z170 Extreme7+ MB with new Intel i3-6320 processor. Processor is provided with standard NIDEC fan (E97379-001). I played a lot with BIOS setting (I downloaded the last 3.00 version) for CPU fan control but I am not able to set it as I want. The fan is generaly noisy so I wanted to set lower rpms for the fan. First I tried to set Silent mode but the fan didn't start up to CPU temperature=65 deg. C. Then I tried Custom option and every other posible setting (4pin vs. automatic too) but it all ended by not starting the CPU fan when I chose the fans speed lower then 50%...
I contacted the AsRock support but they didn't reply (quite sad for customer who has their the most expensive MB...)
Thanks for any help.



Edited by Goore - 26 Jun 2016 at 6:33pm
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Thanks again for your reply parsec

Originally posted by parsec parsec wrote:

Most if not all of the ASRock Z170 Extreme and Fatal1ty boards have the Smart Fan Speed control on all the fan connectors. You must verify that with the specifications of a particular board.
I checked the 

ASRock Fatal1ty Gaming Z170 Gaming K4 
http://www.asrock.com/mb/intel/Fatal1ty%20Z170%20Gaming%20K4/

And from the manual 
Quote 2 x CPU Fan Connectors (4-pin) (Smart Fan Speed Control)
4 x Chassis Fan Connectors (4-pin) (Smart Fan Speed Control) 
* CPU_FAN1 and CHA_FAN1 can auto detect if 3-pin or 4-pin fan is in use.

It seems the same as my Z170 Pro4, just mine has two auto detect on CPU_FAN1 (same) and CHA_FAN1 (different as its CPU_FAN2).  So i would think the rest of the fan headers are the same as my CHA_FAN2, that its PWM but cant do 3pin voltage control.  And dont get me wrong its fine, ill adapt to it, but would be much better if all were autodetect, Asus atm has all their headers switchable manually on the bios, to me it would be great if AsRock considers doing the autodetect on all their headers, at least on their higher end mobos.

Originally posted by parsec parsec wrote:

Don't forget that the power usage of the AP182 fan is more than any of the fan connectors on your board is designed to supply. If you constantly prevent that fan from running at full speed, you might not damage the fan connector circuit, but you are taking a chance and the board could be damaged. SilverStone, in their excellent manual for that fan, includes several warnings about that.
Thanks for the warning, i have been running the AP182 on MSI mobo for almost two years now, no issues, but i dont run them full, i usually have the knob like 30% up and the use the mobo to undervolt it further, at the end i get 350rpms on idle and 650rpms on load (out of the 2150rpms that it reaches), that doesnt mean that it will work fine or in time that i wont have issues, but ill take my chances, i bought AsRock specifically because of the Bios fan control to control AP182, if i cant do this, ill probably switch to another case or go water.

Originally posted by parsec parsec wrote:

I'm skeptical that the CHA_FAN2 connector on the H170 Pro4 only has PWM fan speed control. But I would need to test that myself. Usually, PWM fan speed control is more expensive to implement than voltage control.
I did test mulitple fans, on the Intel stock cooler i was able to drop it 1100rpms and on the thermalright TY147A PWM i manage 299rpms, which are in line with Asus can do with FanXpert and MSI on bios.  I then tested a Noctua NF-S12B Redux 700rpm (3pin) and it ran at 725rpms, and i tested the AP182 and it ran at 2150rpms, i entered the bios and tried customized and the profiles and no difference, to me, the header is PWM only, as PWM headers/fans always operate at 12V and regulate via the pwm signal.

At the end CHA_FAN2 being PWM and not able to control 3pin is not a big deal, i will route the cable in the back and use this for my CPU fans (all pwm) and then route CHA_FAN1 and CPU_FAN1 (auto detect headers and able to do voltage control) to both AP182s, and be done with it.

Again really happy with AsRock atm, i think the bios fan control its the best that i seen, really amazing stuff, specially no restrictions, mulitple breakpoints, and love the autodetect headers (they really work), but the only thing i would like to see is all headers autodetect, this will allow users to use the included fans or upgrade to PWM and the motherboard will handle it.
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Most if not all of the ASRock Z170 Extreme and Fatal1ty boards have the Smart Fan Speed control on all the fan connectors. You must verify that with the specifications of a particular board.

Don't forget that the power usage of the AP182 fan is more than any of the fan connectors on your board is designed to supply. If you constantly prevent that fan from running at full speed, you might not damage the fan connector circuit, but you are taking a chance and the board could be damaged. SilverStone, in their excellent manual for that fan, includes several warnings about that.

I'm skeptical that the CHA_FAN2 connector on the H170 Pro4 only has PWM fan speed control. But I would need to test that myself. Usually, PWM fan speed control is more expensive to implement than voltage control.
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THanks parsec for the detailed info.

I edited my post, probably while you were seraching for all that great info. =)

I manage to get it working upon further testing, it was my fault, the AP182 have a very high starting voltage, depending on the sample 60-70%, so both the CPU_FAN1 and CPU_FAN2 can manage the fan dynamically with the CPU temps.  Sadly the CHA_FAN2 cant, it seems its a pure PWM header, so ill have to use the CPU_FAN for one of the AP182 on the FT05.

All in all im pretty happy with AsRock and their bios fan control.  The only thing that i would like to see in the future, is all fans headers with autosensing and allowing to be manage as the CPU_FAN1 and CHA_FAN1.  At least on the Extreme or Fatal1ty series, i would drop more money on a mobo if i can get more control and flexibility on the fan control.


Edited by Abula - 15 May 2016 at 3:56pm
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Originally posted by Abula Abula wrote:

Just some comments, i manage to get some time today and still in the process of testing on an AsRock H170 Pro4,

CPU_FAN1 
Its PWM fan control its the best that i have seen/tested, you can set any temperature and any % pwm, no restrictions at all that i can see, by far what i always wished other manufacturers do. You can go in 1% increments on 1C, so this allow to reach whatever you want, 4 breakpoints allow you to do the cueve you like.

CHA_FAN1
This fan does the same as CPU_FAN1, it has a difference though, its autosening decides if its 3pin or 4pin, and this is very good, as you can use the bios the same as you do CPU_FAN, I tried a Noctua NF-S12B REDUX 700rpm (3pin) and it can do the full 700rpms or drop down to 200rpms on pure bios on voltage control. I also tested a TY147A and the austosering worked the same, as far as i could tell, as with my MSI and Asus mobos i can drop it to 300rpms or pull it up to 1300rpms, and as the CPU_FAN1 you have the 4 breakpoints, so there you can do the graph you wish with it, again no restrictions that i can see, love the this. But there is turn down for me, seems it cant power the silverstone AP182s, it bearly starts them on booting, but once bios loads or windows.... the fan is off, no matter the settings i change on the bios, even the presets, even the full 100% doesnt move the fan at all, my only conclusion is the header doesnt have enough power to move it.

CHA_FAN2
This is a different header, its 4pin as the CHA_FAN2, but seems the autosensing doesnt work (from what i have read only 2 headers have this feature on Asrock so in my case are the two above), that said its not a big deal, and this header can power the AP182, just the issue is that its always on 12V, no setting change on the bios (presets or graph) that would undervolt it. I also tested the Thermalright TY147A here and it works great, same as two above, this leads me to say this is a fully PWM fan header (not switchable).

For the above, and because im with FT05 i cant use the AsRock, mainly its the AP182, i'll do some more testing tomorrow.  AsRock semes very good, i like what they have done on bios, for a pure PWM fan build is superb, for a 3pin mix.... i would say it has its restrictions, and not many headers that can do voltage control, i think it still can be done fine, as long as not many 3pin fans. Im happy to see how AsRock has design their fan control, but sadly its not for me.


It's a shame that the AP182 fans in your PC case are affecting your choice of mother board. IMO, it is the AP182 fan that is the problem, not the board itself, more on that below.

Also, you cannot expect a lower priced board like the H170 Pro4 to have the same features as more expensive boards. I don't know what the price of this board is where you live, but in the USA it is about $90.

All fans are different regarding their electrical specifications, such as maximum power usage, starting voltage (minimum voltage needed to get the fan spinning), maximum speed, etc. There are no standards for power usage or starting voltage, they are whatever the fan designers give us.

Most modern PC fans have a starting voltage of about 6V, many start spinning at 5V or less. Maximum power usage of these fans is about 0.5A (6 Watts), although many fans use much less power than that. The size of a fan is not related to the amount of power it uses, very large PC fans can use the same amount of power that a very small fan does.

Let's look at the specifications of the AP182, these are from the manual supplied with these fans when sold individually:



A link to the AP182's manual: http://www.silverstonetek.com/downloads/Manual/fan/Multi-AP182-manual-V1.pdf

The AP182 is not a typical PC fan, its power requirements are greater than most PC fans. From the AP182 manual:

The AP182 is a relatively high current fan. At its maximum speed, the AP182's current will peak at 1.8A with continuous current at 1.3A.

Not all motherboard fan headers will support the AP182... To properly support AP182, the fan header needs to be able to provide continuous current of at least 1.3A.

The fan headers on ASRock boards are rated at 1.0A/12W maximum (continuous), which is standard for PC mother boards. This fan can use more power than is available from mother board fan headers. It will be difficult finding a mother board with a greater power rating for the chassis fan connectors.

Note the Start Voltage, which is measured with the manual speed control connected to the fan. 9V is the lowest starting voltage. Very high for a PC fan.

Then the fan's speed range of 500 - 2000 RPM is controlled only between 9V and 12V. That 3V range is small, which is another reason for the manual fan controller. I wonder how precise the speed control can be with manual speed controller?

The CHA_FAN2 connector is not the problem, the unique requirements of the AP182 fan simply make it unusable with mother board fan connectors. I'm not surprised that the CHA_FAN1 header could not get an AP182 spinning if you are connecting it directly to the mother board. Even if the board could supply enough power to the fan, the high starting voltage and small voltage range for speed adjustment is not compatible with standard mother board fan speed control.

I highly doubt you will be able to find a mother board with fan connectors that can work with AP182 fans, at any price. SilverStone knows this fan is not compatible with standard mother board fan connectors, and supplies the manual speed controller for that reason.

You'll never find a mother board with fan connectors that provide more than 12W of power, that costs $100.
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