Asus Z87 Fan Control

[Darthodor]

I built the PC with an Asus Sabertooth Z87 mobo, i7-477K, Corsair H100i liquid cooler, and the H100i cooler. The cooler radiator assembly has two fans, and the case has front, side, rear fan, and two small fans are built into the mobo shielding to blow air over the mobo components. After booting up and running AI suite to optimize fan control, all of the fans ran at a relatively low RPM and the Unit made very little noise. That was before I flashed the bios. After that, the H100i cooling fans run at full speed. Even when set to silent mode, other fans in the case turn down or completely stop, but the H100i fans keep running at top speed. Does anyone know what the H100i fans won't slow down again? The components on the mobo including the video card (MSI R7950 twin frozr III) barely even get warm under load. I've already un/reinstalled the asus AI suite and recalibrated the fans, several times.

 

[Som3one]

So, you have the H100i fans connected directly to your motherboard? Or to the H100i connector?

If it´s the first one, you might want to check the fan settings in the BIOS itself. And the selected value for the desired temperature.

 

[raja@asus]

Set the headers the H100i fans are connected to, to "Advanced" in UEFI and then re-run the calibration software. suspect these are DC fans so are running full speed as Auto is PWM control on this newer UEFI and advanced is DC mode control.

 

[Darthodor]

Sorry for my delay. When I upgraded my BIOS to 1007, the fan control stopped working. When I flashed back to the BIOS this is included on the mobo OEM disk back to 0801, I regained complete fan control once again. I see that BIOS 1205 is out there and that is worth a try.

 

[raja@asus]

1007 onwards you need to set the fans to advanced to control in DC mode. You don't need to do that on 0801, that's why.

 

[Darthodor]

Thank you for your suggestion of setting advanced fan control. The details of setting advanced fan control - well, I'm not sure what that includes. However, there are fan profiles for silent mode, standard, etc. for the fans. I mentioned the fans running slowly under the prior bios, so I must have set them to run slowly vice at full speed. The bios was the issue. Setting advanced fan control did not slow the CPU fans. I updated to the latest bios, V. 1205, and I've regained full control of the fans. When I select the "silent" mode, most of the fans shut down completely. I've added a bottom fan, so that make front, bottom, rear, and 2-CPU liquid cooler fans on the top. When I selected the "silent mode" I expected the system to adjust the fan speed, which it did (under all previous bios') except that under bios 1007 I lost control of the CPU fan speed. My H100i cooler is set up according to the book. I USB going to the USB header, the 1-wire jack connected to the CPU fan header, the cooler pump motor power cord connected to the power supply. So, my advice is to flash to bios 1205 if you have the CPU cooler that I have, because when it runs at full speed (x2 fans at about 3600 rpm) it makes a lot of noise but in silent mode the fans drop down to 2319rpm and the CPU is at about 27 C. The temp goes up to around 36 C under load, so that's a really good temperature!

 

[Darthodor]

BTW, if you are using Windows 8 x64, the correct link to BIOS 1205 is http://www.service.asus.com/#!downloads/c1wax

 

[Darthodor]

My PC specifications:
Asus Z87 Sabertooth Mobo
Intel i7-4770K CPU
Windows 8 x64 Professional
32 Gb G. Skill RipJaws X 1866 (F3-1866C9Q-32GXM)
Plextor 256Gb PX-256M5Pro R SSD
Corsair H100i Hydro Series CPU Liquid Cooler
MSI R7950 3GB Twin Frozer 3GDS
Coolmaster 932 HAF full tower case
Corsair HX850 Power Supply
3 Seagate 3tb Barracuda Sata Drives
1 Seagate 2tb Barracude Sata Drive
NZXT IU01 Internal USB Expansion
(adds USB 2.0 - 3-Headers and 2-Ports all internal)
ORICO front mount 4-button AC control
(Power on/off any SATA drive pushing a button)
Sony BDPS480 Blue-ray Disc
AOC E2752V full 1080 monitor
Logitech Z506 5.1 Surround Sound
AVG Security Suite
MalwareBytes