KTQM77/mITX Users Guide
KTD-N0850-B Page 19
2.6 Power Consumption
In order to ensure safe operation of the board, the ATX12V power supply must monitor the supply
voltage and shut down if the supplies are out of range – refer to the hardware manual for the actual
power supply specification. Please note, In order to keep the power consumption to a minimal level,
boards do not implement a guaranteed minimum load. In some cases, this can lead to compatibility
problems with ATX power supplies, which require a minimum load to stay in regulation. The
KTQM77/mITX board is powered through the ATX+12V (4-pole) connector and optionally also ATX/BTX
(24-pole) connector.
Single 12V supply
: When powered by 12V only (via ATX+12V connector) then limitations apply to +5V,
where 14x USB, LVDS panel or eDP panel, COM ports, LPT port and Frontpanel connector shares
9.5A. 4-pole connector power limitation is 145W maximum, but if required more +12V power can be
added via +12V (and GND) terminals in the 24-pin power connector. It is allowed to use the +12V and
+5V from the 24-pole connector in order to drive external devices, but please notice that it is not allowed
to use the SB5V, POK and PSON# signals.
ATX12V supply
: Both ATX+12V connector and ATX/BTX connector must be used in according to the
ATX12V PSU standard.
Warning
: Hot Plugging power supply is not supported. Hot plugging might damage the board.
The requirements to the supply voltages are as follows:
Supply
Min
Max
Note
VCC3.3
3.135V 3.465V Should be
±
5% for compliance with the ATX specification
Vcc
4.75V
5.25V Should be
±
5% for compliance with the ATX specification.
Should be +5/ -0% to meet the USB standard.
+12V
11.4V
12.6V Should be
±
5% for compliance with the ATX specification
–12V
–13.2V –10.8V Should be
±
10% for compliance with the ATX specification
-5V
-5,50V
-4.5V
Not required for the KTQM77 boards
5VSB
4.75V
5.25V Should be
±
5% for compliance with the ATX specification
Total System power example
TBD
CPU? @ ? GHz, ? GB Ram, 1x xxxgb HDD, 1x DVD-ROM, PSU
Operation
Power Supplied via
ATX + 12V
12V Only
Windows 7 32bit Idle
33W
36W
Windows 7 32bit 3Dmark 2003
70W-88W
72W-96W
Windows 7 32bit Intel Thermal Load
111W
111W
Note: Listed power consumptions are inclusive 15 - 25W for PSU, HDD and DVD.
More detailed Static Power Consumption
TBD
On the following pages the power consumption of different boards in different configurations are listed.
For each configuration the power consumptions result are listed in 5 tables:
1- DOS, idle, mean
2- Windows7, Running 3DMARK 2005 & BiT 6, mean
3- S0, mean
4- S3, mean
5- S5, mean
Note: some S5 measurements have been carried out in two sub modes M3 and Moff. Only S5/M3 mode
maintains power to the circuits used for AMT and waking up the system via LAN, Keyboard and USB,
while both S5/M3 and S5/Moff maintain power to RTC, Power Button In circuit and CMOS data.
System Specification
