Installation | Sensor Locations
| SM Bus
- Screws – 2 types, 5 each
- 8 thermal tape strips
- 8 sensors – 6 bulb types, 2
- V+ 12V
monitoring function ±5% tolerance level
- Compatible with two-pin or three-pin fans
(supports RPM monitoring function for three-pin
- Temperature range 0-99 °C
support up to 8 sensors
- Backlight function
- Real-time scan function
quickly into any 5.25" slot (takes up no extra space by
replacing the 5.25" panel)
channels can be programmed separately, temperature levels
easy to program
reads unit temperatures every 5 seconds (complete cycle every
- Battery-free, EEPROM technology keeps
memory settings protected
use of continuous fan operation or power-saving standby
Installed unit into lowest
5.25” drive bay. The CD contains only one PDF file
with the User Manual and Installation guide. Connected
4-pin power lead from power supply. Placed sensors and
connected fans according to the table below.
Some fans (including the Kingwin case fans) need a 4-pin
female to 3-pin female adapter cable. This adapter cable
includes a fan speed lead and was purchased from a local
||Ambient (behind front bezel)
||Top rear, near PSU
||GPU heat sink (film sensor)
All other sensor inputs are unused.
Initially more temperature sensors were placed inside the case.
In June 2005, most of the DigitalDoc5 sensors were replaced with integrated sensors on the main board. None
of the fans are controlled by the
DigitalDoc5 and its own mini-fan is disconnected.
The DigitalDoc5 unit falls short of
expectations. When a monitored temperature reaches the
threshold value, more than one beep signal is sounded until the
temperature rises finally high enough to stay above the
threshold. These beep signals were annoying.
More importantly, there is no easy way
to place the temperature sensors for optimal heat transfer. For
example, a sensor pressed between the fins of the CPU HSF may
report temperatures that are over 10°C lower than the
temperature indicated via the
Because of these shortcomings the
ultimate goal is to replace the DigitalDoc5 unit completely, as
soon as a better alternative for measuring the remaining
temperatures can be found and all temperatures and fan
speeds can be monitored using the System Management Bus.
The choices for SM Bus software utilities are:
Motherboard Monitor 5 –
development has ceased. Can read the same sensor values as SpeedFan,
including HDD temperature. Provides sophisticated alarm features.
The divider of the rear case fan (SilenX fan) must be
adjusted to 32, otherwise the speed value is always 0.
– My current favorite. It displays temperatures including HDD, voltages, fan
speeds, SMART information. Author maintains an
defect tracking system. SpeedFan reads the temperature for
the CPU (Temp2) and the motherboard (Temp1), as well as the
first hard disk (HD0). It also detects the disks in RAID 0
configuration (HD1), but is not able to read the temperatures of the
disks in the array. Another temperature sensor is always read at
25°C (Temp4), no matter what happens in the environment.
The PSU fan speed is read by sensor Fan2, the CPU fan by sensor
Fan1, the case fan by sensor Fan3.
The HD0 sensor displays 0°C after resume from hibernate
The +12V voltage sensor displays 11.43V, although DigitalDoc5
and Asus PC Probe display 12.02V. The reading for -5V is also
wrong. There is an entry in the FAQ about this – ASUS
apparently does not adjust the sensor reading to the
correct range. However, Asus PC Probe utility displays the
voltages correctly. The two sensor readings are turned off in
Fan speed of power supply fan is shown as “0 RPM”
although fan speed signal cable is connected to the motherboard
correctly, and the fan speed is displayed in the BIOS. This can
be fixed by turning off the BIOS Monitor setting
“Ignore”. However, the BIOS will report a failure
for this fan during booting, since the fan spins below 1500
rpm. Also, the divisor for Fan1 needs to be set to 8 in the
advanced configuration tab, otherwise the sensor reads 0 rpm
unless the fan spins at full speed.
Asus PC Probe – would be sufficient if it provided the HDD
temperature and SMART information. CPU temperature cannot be
shown on the task bar.
Lavalys Everest Home Edition – Provides a lot of
system information in an intuitive user interface. Cannot
display sensor data in the taskbar. It seems that sensor labels
and other properties (fan rpm divisor) cannot be modified.
The fan data is assigned to the wrong labels and/or the
divisors are incorrect.
The power supply fan is read with the wrong divisor – rpm
The -5V data is about 0.5V too low.
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