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FAN CONTROL

The Smart Fan feature supports both 4-pin and 3-pin fans, so we connected one of each to the two available fan headers — the X2 4850e heatsink stock fan (650 to 3200RPM) and a Scythe Kaze-Jyu 100mm case fan (SY1025SL12H, 700 to 2100RPM). We then stressed the system with CPUBurn K7 and monitored the relationship between Core temperature and fan speed via SpeedFan.

Core Temp.
Fan Speed (RPM)
CPU_FAN
SYS_FAN
25°C
850
1400
30°C
1100
35°C
1350
40°C
1700
45°C
1950
50°C
2250

The Scythe fan connected to the SYS_FAN header remained at a steady 1400RPM through out. The fan connected to the CPU_FAN header on the otherhand had an almost linear relation to the Core temperature, following it very closely, increasing gradually in a nice, steady, gentle curve. We found its behavior to be pleasant — there were no sudden, jarring ramp ups in speed. We assume that beyond 50°C, the fan speed continues to increase in the same manner until it hits whatever the maximum threshold temperature is.


EasyTune's Smart Fan configuration screen.

For those looking to fine tune Smart Fan's behavior, Gigabyte's EasyTune utility offers some additional control, in that you can set minimum and maximum CPU fan speeds as well as threshold temperatures. The downside is that the EasyTune GUI is horrific looking. While we believe the intention was to make it look like the controls of a commercial airliner we can't help but notice its resemblance to an uterus.


Fan header correlations in SpeedFan.

If you choose to bypass Gigabyte's Smart Fan control, SpeedFan would be an excellent choice as it provides full customizable control over both fan headers. Change PWM mode 1 and 2 to "Software Controlled" in the Advanced menu and you're ready to go.



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