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Thread: ASRock z77 Extreme 6 PWM help.




  1. #11
    parsec's Avatar
    parsec is offline Senior Member
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    Default Re: ASRock z77 Extreme 6 PWM help.

    Quote Originally Posted by grimreaper1014 View Post
    Thanks for the tips guys. I am going to try with just one fan attached to each PWM header today and see what happens.

    parsec which CPU cooler and PWN fans do you use? Could you share your BIOS settings so I can make sure I can get a gerneral idea of how they should be setup in the BIOS? I just want to make sure I am using the correct configuration.

    I flashed my BIOS to version 2.70. I noticed there is now a custom PWM fan control setting as well. I'm not sure if it is new or not though. I have tried playing with it a bit as well. It reduces the speed just fine. The only thing is like the PWM header I don't notice any varied speeds according to the temp.

    Yep, sorry I had a hard time explaining what I meant. I realize they don't turn all the way off. Its just I'm not seeing any difference in speed at all regardless of temp. I have tried just about every setting.

    I also checked the specs as well for the H220 and noticed the same thing you did. I also noticed one more thing. It says if your fans are running at 100% all the time to adjust the fan speed manually in the BIOS. The only thing is there is no manual setting for the CPU header in the BIOS. It just has manual for the case fan PWM header. I guess I could always just set it to auto,45c, with a custom level to get the speed I want. When I lower the pump speed to around 2000RPM its not really that noticeable. Neither are the fans. Do you think 2k RPM for the pump is still sufficiently moving water through the loop? This is my first water cooling setup so I don't know much about how fast a pump needs to run etc.

    If I can get these PWM headers figured out what I would like to do is connect the pump directly to the CPU PWM header. That it can run properly and adjust speed according to temp. Then, on the PWM header for case fans connect the Swiftech 8 way splitter and all of my case fans. I will have to buy like 3 PWM extension cables for the two top mounted external fans on the rad and the rear exhaust fan but I think that will be the best bet. I guess if all else fails I see they have some fan controllers that have one PWM header on them to control a PWM fan. I guess I could research a good one and just use it for my PWM fans with the Swiftech 8 way-splitter.

    When testing if the PWM function is working correctly what would be the best way to test? What is a good program to get the heat of the PC up? Then, I could just monitor the fans with ASRock Extreme Tuner?

    I have several PCs, but the ASR Z77 Ex 4 boards (two) I use have Corsair H60's with Scythe 120mm PWM fans, the "Kaze-Jyuni" Slip Stream PWM SLH-P. They are no longer readily available in the USA, due to Scythe apparently not shipping fans to the US market for some reason. I use them in an unconventional way, in "pull" mode only with shrouds on the radiator.

    I just remembered an important detail about this board and the AXTU program, the Extreme Tuner you mentioned. If you use it and have the "Auto run when windows start(s)" option checked (bottom of the screen), whatever settings are set in the Fan Control (or any other screen) screen will override the BIOS/UEFI settings. If you use AXTU be sure to check that the Auto run option is NOT checked, or your settings in the BIOS will not matter.

    When you asked about BIOS settings, do you mean everything or just fan control? The BIOS screen shot seemed to not work for me, I'll try that again.

    It's hard to say what speed the pump should run at without actually using one. You can just go by the CPU temperature, if it is low and stays low under stress, then it's fine.

    My board's BIOS has manual fan speed control on all the chassis fans, and I think yours does too. Chassis 2 has four levels you can select, and Chassis 1 and 3 have a Manual selection that then displays various levels. Some details have changed, but the following is from your boards manual:

    ASRock z77 Extreme 6 PWM help.-z77ex6-fancontrol-jpg

    Looks like manual control is available to me, my board sure has it. You can put a PWM fan on a three pin fan header, and it will be controlled the same as a three pin fan. I would try putting the pump on Chassis fan header 2 or 3, and adjust the speed with the manual controls. Then put the radiator fans on CPU Fan 1, and your other fans controlled by Chassis Fan 1, with either cable or adapter.

    Set Chassis 1 on manual, and with AXTU running, change the level, 1 is the lowest. If your fans don't change speed, something is weird. The pump speed is not that critical at this point, you're trying to get the fan speeds under control, and IMO getting the pump out of the system is the main test to do.

  2. #12
    grimreaper1014 is offline Junior Member
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    Default Re: ASRock z77 Extreme 6 PWM help.

    I been making all my settings via the BIOS. Luckily I did notice the box at the bottom of AXTU and made sure it wasn't checked. Thanks for the heads up.

    Yeah I was just curious to see what fan settings you use for your PWM fans for CPU and CHA_1.

    I tried playing with the pump yesterday. It is working as it should now. It starts out at around 2200RPM and when the CPU goes over 45c it goes up to 3000RPM.

    My board has the manual setting as well. However, what I mean is there is an option to set the CPU fan on a level from 1 - 255 for even more precise control. I wish they had that for the CHA_Fan1 header as well. That way I could get the fans down to 1200RPM instead of over 1400RPM.

    The pump and surprisingly the fans for the radiator that we thought wouldn't work because of the pump seem to be working as PWM should. They start out quite and as the heat increases with OCCT they get louder and I watch the RPM's on the Pump increase from 2kRPM to 3kRPM. The fans also get louder and I can feel them blowing more air.

    The problem now seams to be the fans on CHA_Fan1. They are not changing speed regardless of temp. As an experiment I have tried setting the PWM temp to 45c and running OCCT. The temps definetly got over 45c and there was no difference in RPMS on the fans connected to CHA_Fan1. I am going to give it a try without the splitter cable later today.

    Thank you for your help. I greatly appreciate it.

  3. #13
    parsec's Avatar
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    Default Re: ASRock z77 Extreme 6 PWM help.

    Sounds better, but what changed? Your description is what should be happening, but something must be different if it did not work like that before.

    I checked one of my Z77 PCs, and I the Custom level on the CPU fan is gone. Strange, but between my Haswell build and the others, I'm sooo confused.

  4. #14
    grimreaper1014 is offline Junior Member
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    Default Re: ASRock z77 Extreme 6 PWM help.

    Quote Originally Posted by parsec View Post
    Sounds better, but what changed? Your description is what should be happening, but something must be different if it did not work like that before.

    I checked one of my Z77 PCs, and I the Custom level on the CPU fan is gone. Strange, but between my Haswell build and the others, I'm sooo confused.
    I'm not real sure what was causing it not to work correctly before. However, I assume that the games I was playing just wasn't getting the CPU hot enough for it to work. As I mentioned above I am still having problems with the other PWM fans on CHA_Fan1 though. There speed does not increase at all regardless of the temp even with one fan connected. I'm not sure whats going on with it. I have it set to Automatic, 50c, level 2 which gives me about 1400RPM's. Regardless of temperature that is what the fans always read is 1400RPM's.

    The z77 board you checked is it a ASRock Extreme series motherboard? Different boards have different setups for PWM control. On some boards its better and some its worse. I believe you said you have a ASRock z77 Extreme4? If so you should see the custom fan speed listed there when you select Automatic. Once you select the temperature and it shows fan speed move the slider on the list all the way up and you should see custom. Then, you can adjust from 1-255. I'm pretty sure that's how its done. I will have to check the BIOS to confirm.

  5. #15
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    Default Re: ASRock z77 Extreme 6 PWM help.

    Yes, the Custom speed entry is listed with the temperatures, I forgot where it was. I described this setting earlier in this thread, but forgot where it was selected.

    Actually, IMO when using the Custom speed setting, the response time of increasing the CPU fan's speed when the CPU temp increases, is slower than the temperature setting modes. It takes 10 - 15 seconds after the CPU temperature has increased substantially, before the CPU fan speed increases at all. Which is why I stopped using it.

    What do you use to monitor CPU temperature? There are all kinds of programs for that, including the ASRock utility. It should be easy to see if the fans on Chassis1 change speed with CPU temperature.

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