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Rampage IV OPT_FAN1 header - cannot control fan speed.

izajasz
Level 10

‎09-16-2012 07:09 AM - last edited on ‎03-06-2024 07:22 PM by Community Admin

Hello,
There is a problem with rampage IV mobo(s). When I connect 4 pin PWM fan to the OPT_FAN1 connector i cannot controll RPM. Mo matter whan i set in bios it still runs full RPM. I connect the same fan to any other connector (for example OPT_FAN2 or CHA_FAN1) and it controlls through bios perfectly so its no the fan. I ve replaced the mobo for another one and this one has the same issue... Any idea whats wrong ?
MOBO: MVIE BIOS 1402 stock
CPU Core i7 4770K
RAM: 16GB Corsair Dom. Platinum CMD16GX3M4A1866C9 in XMP, SPEC: http://bit.ly/Z56xfm
SSD/HDD: OS-SAMS 840Pro 256GB, APPS - SAMS 830 512GB, DATA - Seagate ST1000DM003
GPU: 2x EVGA GTX 680 FTW+ in SLI config (UEFI BIOS)
AUDIO: Onboard
CPU Cooling: Corsair H110
PSU: Seasonic Platinum 1000W (SS-1000XP)
CASE: NZXT Phantom 630
DISPLAY: ASUS VG278Q (120Hz)
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3 REPLIES 3

Whoopsy
Level 7

‎09-16-2012 05:38 PM

I've had the exact same problem as you, replacement did not correct issue.

I just gave up and used a different header.

Hopefully they can do a bios fix.
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izajasz
Level 10

‎09-17-2012 01:06 AM

Well i have replaced 2 times now . And it was the same on every mobo . ASUS please check this !
MOBO: MVIE BIOS 1402 stock
CPU Core i7 4770K
RAM: 16GB Corsair Dom. Platinum CMD16GX3M4A1866C9 in XMP, SPEC: http://bit.ly/Z56xfm
SSD/HDD: OS-SAMS 840Pro 256GB, APPS - SAMS 830 512GB, DATA - Seagate ST1000DM003
GPU: 2x EVGA GTX 680 FTW+ in SLI config (UEFI BIOS)
AUDIO: Onboard
CPU Cooling: Corsair H110
PSU: Seasonic Platinum 1000W (SS-1000XP)
CASE: NZXT Phantom 630
DISPLAY: ASUS VG278Q (120Hz)
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mdzcpa
Level 12

‎09-20-2012 05:11 AM

I found that running Duty Mode is the best way to control fan speed on OPT_FAN 1. Using 50% for me works great. However, I use Duty Mode for all three OPT fan headers and I think that might be the key to controlling all the fans correctly.
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