Mainboard KX550
Power Supply Attachments
PCIE Power Connector: J1
The 4-pin connector provides an extra +12V for the PCI-E x16 slot
in order to increase the stability of your graphics card. You can
attach the 4-pin connector to power supply directly.
ATX Power Connector: ATXPWR, ATX12V1
This mainboard provides two ATX power connectors, a 24-pin ATXPWR connector and an
8-pin ATX12V1 connector. You must use a power supply that has both of these connectors
and both connectors must be attached before the system is powered on. These power
connectors support several power management functions such as the instant power-on
function. The connector pins are described below.
Pin
Assignment
Pin
Assignment
1 +3.3V
13
+3.3V
2 +3.3V
14
-12V
3 Ground 15
Ground
4 +5V 16
PS_ON
5 Ground 17
Ground
6 +5V 18
Ground
7 Ground 19
Ground
8 PW_ON 20
-5V
9
+5V standby voltage
21
+5V
10
+12V 22
+5V
11
+12V 23
+5V
ATXPWR
12
+3.3V 24
Ground
Pin
Assignment
Pin
Assignment
1
Ground
5 +12V
2
Ground
6 +12V
3
Ground
7 +12V
ATX12V1
4
Ground
8 +12V
Attention
In general, power cords are designed and should be attached with a
specific direction. The black wire of the power cord is Ground and
should be attached onto the header location of Ground.
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