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BIOS & FAN CONTROL
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The maximum values allowed in the JumperFree section of the BIOS.
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Notable BIOS Adjustments
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Setting
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Options
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+1.2VNBSB (chipset)
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+1.20V to +1.50V in 0.10V increments.
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DDR2 Voltage Control
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+1.80V to +2.10V in 0.10V increments
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CPU Multiplier
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5x to 11.5x (maximum depends on the CPU)
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CPU Voltage
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0.800V to 1.550V in 0.025V increments
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CPU Frequency
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200Mhz to 400Mhz in 1Mhz increments
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| Memory Clock Frequency |
DDR2 400, 533, 667, 800 |
| LDT Bus Frequency |
1Ghz, 800Mhz, 600Mhz, 400Mhz, 200Mhz |
| UMA Frame Buffer Size |
32MB, 64MB, 128MB, 256MB |
| CPU Fan Speed Warning |
Disabled, 800RPM, 1200RPM, 1600RPM |
The BIOS offers voltage control options which are usually absent on mATX boards.
The CPU can be undervolted all the way down to 0.800V and overvolted to 1.550V.
Memory and chipset voltages are capped at +0.30V over default. LDT Bus Frequency
(a.k.a. HT multiplier) is adjustable as is memory frequency, but memory timings
cannot be manipulated at all. The maximum amount of memory one can allocate
to the integrated video subsystem is 256MB. There is also a CPU Fan Speed Warning
setting which can be set as low as 800RPM, so the board will not chirp if a
moderately low speed fan is used to cool the processor; it can also be disengaged altogether.
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The Hardware Monitor section of the BIOS.
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The Hardware Monitor menu offers automatic fan control for the CPU fan in the
form of Q-Fan. There are no customizable options for it however — it can only
be turned on or off. CPU Fan Type can be set to either DC or PWM, indicating
that it will function with both 3-pin and 4-pin PWM fans.
SpeedFan Support
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SpeedFan's Readings screen.
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When we loaded up SpeedFan,
it reported five fans even though there were only three headers. After some
investigation we found that Fan1 correlated to CPU_FAN, Fan2 to CHA_FAN, and
Fan4 to PWR_FAN. The Core temperature reported was quite low, so we decided
to ignore it. Temp1 rose 30°C when the CPU was put on load so we assumed
this reading was the CPU temperature.
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SpeedFan's reported values.
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The only working fan speed control setting we could find was Speed02, which
controlled the CPU fan. To enable this you must first enter the Advanced menu
and change PWM 2 mode to "Software controlled" (note: if you set this
to "SmartGuardian" it gives control to Q-fan). Once this is done,
you will have a full range of control (0 to 100%).
With the system idle, using an AMD heatpipe cooler, Q-fan had the fan spinning
at 1050RPM, which is approximately 45% in SpeedFan. When we ran CPUBurn, the
CPU temperature peaked at 50°C, but the fan speed did not increase. We had
to manually stop the fan and let it heat up before we noticed the fan start
to ramp up, which began at around 52°C. Beyond this point, the fan speed
increased quickly.
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