Pinouts >  ATX, WTX and other standard and proprietary power supply (PSU) cables connectors
24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007) connector layout
24 pin MiniFit Jr 5566-24 male (MOLEX 44206-0007) connector
at the motherboard
standard interface between BTX motherboard and compatible power supply
PinSignalDescription
1+3.3 VDC 
2+3.3 VDC 
3COM 
4+5 VDC 
5COM 
6+5 VDC 
7COM 
8PWR_OKPower good - indicate that VDC voltages are in range.
9+5 VSBStandby voltage
10+12 VDC 
11+12 VDC 
12+3.3 VDC 
13+3.3 VDC 
14-12 VDC 
15COM 
16PS_ON#Active low. TTL compatible (0.1-0.8V low; 2.0 high?). When low - DC outputs are enabled. When high - power supply should not deliver DC current.
17COM 
18COM 
19COM 
20N/C 
21+5 VDC 
22+5 VDC 
23+5 VDC 
24COM 
24 pin MiniFit Jr 5557-24 female (MOLEX 39-01-2240) connector layout
24 pin MiniFit Jr 5557-24 female (MOLEX 39-01-2240) connector
at the power supply cable
Pinout status: +4 -0
According to 4 reports in our database (4 positive and 0 negative) the BTX motherboard power supply pinout should be correct.

Is this pinout
NO DIY devices
BTX motherboard power supply visual pinout:click to enlarge
Source(s) of this and additional information: BTX interface specification at the www.formfactors.org
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