TYAN TS75-B7122 Service Engineer's Manual page 102

J55/J56: 8-pin Power Connector to CPU
J12/J14/J33/J36: 8-pin Power Connector to GPU Card
NOTE: The 8-pin GPU power connector can support up to 20A.
Signal
GND
GND
GND
GND
Signal
GND
GND
GND
GND
102
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Pin Pin Signal
1 5 P12V
2 6 P12V
3 7 P12V
4 8 P12V
Pin Pin Signal
1 5 P12_GPU1
2 6 P12_GPU1
3 7 P12_GPU1
4 8 P12_GPU1