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| System Board and Riser Board Reference Designators | |
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| Designator | Component (Continued) |
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| P23 | Header for front panel audio | |
| P24 | Header for front panel USB | |
| P25 | Internal USB connector 1 | |
| P26 | Internal USB connector 2 | |
| P27 | MultiBay header | |
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| P29 | SCSI LED connector | |
| P30 | PCI extender slot (female) | |
| P40 | Blade PC graphics connector (outboard) | |
| P41 | Blade PC graphics connector (inboard) | |
| P52 | Second serial port | |
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| P54 | Primary serial port | |
| P55 | Double stack serial port, Top = Serial B, Bottom = Serial A | |
| P58 | Riser edge connector | |
| P60 | Primary Serial ATA (SATA) connector | |
| P61 | Second Serial ATA (SATA) connector | |
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| P62 | Third Serial ATA (SATA) connector | |
| P63 | Fourth Serial ATA (SATA) connector | |
| P64 | VSFF expansion connector | |
| P65 | Graphics option connector | |
| P66 | Fifth Serial ATA (SATA) connector | |
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| P67 | Sixth Serial ATA (SATA) connector | |
| P68 | Seventh Serial ATA (SATA) connector | |
| P69 | Eighth Serial ATA (SATA) connector | |
| P70 | Primary (CPU) fan header for fansink | |
| P71 | Secondary CPU fan header for fansink | |
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| P80 | Primary Serial Attached SCSI (SAS) connector | |
| P81 | Second Serial Attached SCSI (SAS) connector | |
| P82 | Third Serial Attached SCSI (SAS) connector | |
| P83 | Fourth Serial Attached SCSI (SAS) connector | |
| P84 | Fifth Serial Attached (SAS) connector | |
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| P85 | Sixth Serial Attached (SAS) connector | |
| P86 | Seventh Serial Attached (SAS) connector | |
| P87 | Eighth Serial Attached (SAS) connector | |
| P101 | Security board connector, system board | |
| P106 | Secondary speaker header | |
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| P124 | Hood lock header | |
| P125 | Hood sensor header | |
| P126 | Flying parallel port header | |
| P216 | White box chassis fan header | |
| SW2 | Security hood switch on riser card | |
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| SW50 | Clear CMOS switch/push button | |
| U2 | Single chip solution (combined north bridge/south bridge) | |
| U3 | North bridge | |
| U4 | South bridge | |
| U5 | Super I/O | |
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Service Reference Guide, dc7600 |