View Issue Details
|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001768||SpeedFan||Hardware support||public||2011-03-15 11:29||2011-03-15 13:20|
|Platform||Gigabyte 965-S3 / IT8718F sensor||OS||All xp32/xp64/vista/win7|
|Summary||0001768: Behavior of IT8718F. (Pwm1 + 3) = Speed1|
|Description||My Hardware: This motherboard Gigabyte 965-S3 (rev C2, F14 bios) using the IT8718F sensor, and motherboard has fan headers in FAN1 & FAN2 only (FAN3,FAN4,FAN5 are unused in this revision). It has speed sensors detected in SpeedFan of PWM1 PWM2 PWM3. |
This is something that was driving me crazy. I could hear my computer making a different sound when I adjust PWM3, but there was no fan header or 3rd fan! It turned out PWM1 and PWM3 both affect My Fan1 speed.
So I figured PWM3 is unused, but actually:
Fan1 speed ~= (Pwm1 + 3 combined)
So, PWM1 and PWM3 both affecting Speed01. Like a Fan speed multiplier.
So Is it how the hardware was made or is a software bug?
|Steps To Reproduce||1. install motherboard with i8718f on gigabyte 965p-ds3|
2. adjust pwm1 and pwm3 speed
4. Fan1 RPM adjust from both!
|Tags||No tags attached.|
|Motherboard Model||Gigabyte 965-S3|
|Video Card Model||gtx460|
speedfansens.cfg (6,963 bytes)
I encountered the same behaviour on a Gigabyte P67A-UD3; I tend to think it's by design. My guess is that it's intended to give you a 'finer' adjustment of the processor fan speed.