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RIVE OPT1 fan speed

klosz007
Level 9
Hello,

BIOS 4102.
I noticed that whatever speed setting I would set for OPT1 fan, it always runs at 100% speed.
No such issue with OPT2 fan - e.g. if I set Duty Mode to 50%, it runs much slower then with speed control set to Disabled.
I am using be quiet Silent Wings 3-pin fans attached to right side wall of the case (hard disk cooling).
Can anybody confirm this ?

No way to check this issue with OPT3 fan - connector hidden deep under H80i water cooling unit.

Best regards,
Andy
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1 REPLY 1

klosz007
Level 9
Baaaad ASUS 🙂 Definetly a BIOS bug, found out myself !
The speed of OPT1 fan is controlled by BIOS setting for OPT3 fan 🙂
So I assume OPT1 fan speed setting controls the speed of OPT3 fan (which I have not connected).