ATX 12V: ATX 12V Power Connector
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| Pin | Signal Name |
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| 1 | +12V |
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| 2 | +12V |
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| 3 | Ground |
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| 4 | Ground |
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ATX1: ATX |
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| Pin |
| Signal Name |
| Pin | Signal Name |
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| 1 |
| +3.3V |
| 11 |
| +3.3V |
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| 2 |
| +3.3V |
| 12 |
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| 3 |
| Ground |
| 13 |
| Ground |
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| 4 |
| +5V |
| 14 |
| PS ON# |
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| 5 |
| Ground |
| 15 |
| Ground |
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| 6 |
| +5V |
| 16 |
| Ground |
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| 7 |
| Ground |
| 17 |
| Ground |
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| 8 |
| PWRGD |
| 18 |
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| 9 |
| +5VSB |
| 19 |
| +5V |
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| 10 |
| +12V |
| 20 |
| +5V |
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79 | Chapter 5 |
