Step 6 Attach Cables, Continued
Connector Keys The keys on the connector must be cut to fit on some power supplies, as shown below.
Power Connector Pinout
| Pin | Description |
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| 1 | Power Good (Orange wire) (Not used) |
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| 2 | VCC (Red wire) |
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| 3 | +12 Volts (Yellow wire) |
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| 4 |
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| 5 | Ground (Black wire) |
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| 6 | Ground (Black wire) |
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| 7 | Ground (Black wire) |
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| 8 | Ground (Black wire) |
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| 9 |
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| 10 | VCC (Red wire) |
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| 11 | VCC (Red wire) |
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| 12 | VCC (Red wire) |
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Keyboard Cable The keyboard attaches via a PS/2 keyboard connector, labeled AT_KB.
| Pin | Signal Description |
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| 1 | Keyboard data |
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| 2 | N/C |
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| 3 | Ground |
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| 4 | VCC |
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| 5 | Keyboard clock |
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| 6 | N/C |
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Cont’d
Chapter 1 Hardware Installation | 27 |
