System board components
Figure 1. Components of the system board ![System board components](https://dl.dell.com/content/guides/public/Html/prec_t3420_om_pub/images/GUID-7D2B6F48-C6CD-4AAC-86C2-CF321CB278E6-low.jpg)
- PCI Express x16 Gen 3 slot
- PCI Express x4 slot
- USB 2.0 with network connector
- USB 3.0 connector
- PS2 keyboard/mouse connectors
- serial port connector
- 2 x DisplayPort connector
- HDMI connector
- Line-Out connector
- P2 power connector
- intrusion switch connector
- VGA connector
- CPU socket
- CPU fan connector
- memory slot
- SATA or PCIe SSD Slot
- front power-switch connector
- debug connector
- SD Card Reader (optional)
- front panel power LED indicator
- system fan connector
- audio connector
- USB 2.0 connector
- USB 3.0 connector
- 8-pin power connector
- SATA 0 connector (Blue color)
- SATA 2 connector(Black color)
- password reset jumper
- service mode jumper connector
- speaker connector
- SATA power connector
- CLINK header for Intel WiFi add-in-card
- SATA 1 connector (White color)
- CMOS coin cell battery
- Debug connector
- Thunderbolt connector
- CMCLR jumper
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