ASROCK IMB-147 User Manual page 23

Panel Power Jumper
(3-pin PNL_PWR1)
(see p.10, No. 3)
ATX/AT Mode Jumper
(3-pin PWR_JP1)
(see p.10, No. 13)
1-2 : +3V
2-3 : +5V
1-2 : AT Mode
2-3 : ATX Mode
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