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Compaq Deskpro EP, EN and some servers power supply |
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Same as standard ATX Except for PWR_OK and PS_ON
A Compaq SP750 Server Power supply (Such as PS 7431-1) uses the same pinout as an ATX power supply, except that PS_ON is inverted, and PWR_OK is replaced with 3.3VSB. The wire colors are also different. To use this supply with a normal ATX motherboard, cut PWR_OK and tie the motherboard side of the wire to 5v. Leave the power supply side of the wire unconnected. Then use an inverter such as a 4096 or 7404 to fix the PS_ON signal. Tie the chip's Vcc to 5VSB and GND to GND. Cut PS_ON, and hook the motherboard side to an inverter's input, and the PSU side to the inverter's output. Then tie all remaining pins to ground. An Inverted PS_ON signal is also common in G3 iMacs.
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Last updated at Mon Jan 7 2008 (�������� ��� ����� ��� ������ ����������) | ���� �������� �������� ������ ��� �� ����������? | |
