Precision 3550 Setup and specifications guide

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Ports and connectors

Table 1. External ports and connectors
The following table lists ports and connectors available on Precision 3550.
Description	Values
External:
Network	One RJ-45 port
USB	Two USB 3.2 Gen 1 (Type-A) port One USB 3.2 Gen 1 (Type-A) port with PowerShare One USB 3.2 Gen 2 (Type-C) port with DisplayPort/Thunderbolt (Optional)
Audio	One Universal Audio Jack
Video	One HDMI 1.4b port One DisplayPort 1.2 over USB Type-C
Power adapter port	One 7.4 mm Power connector port One PD 3.0 port over USB Type-C
Security	Wedge-shaped lock slot
Card slot	SD card slot

Table 2. Internal ports and connectors
The following table lists ports and connectors available on Precision 3550.
Description	Values
Internal:
One M.2 Key-M (2280 or 2230) for solid-state drive One M.2 2230 Key-E for WLAN	One M.2 2230 slot for solid-state drive 128 GB/256 GB/512 GB One M.2 2280 slot for solid-state drive 256 GB/512 Gb/1 TB/2 TB One M.2 2280 slot for Self-Encrypting solid-state drive 256 GB/512 GB NOTE To learn more about the features of different types of M.2 cards, see the knowledge base article SLN301626.