Lenovo ThinkStation 3688 User Manual page 15

Input/Output (I/O) features
• 9-pin serial port (one standard and one optional)
• Four Universal Serial Bus (USB) 2.0 connectors (two on the front panel and two on the rear panel)
• Four USB 3.0 connectors
• One Ethernet connector
• One DisplayPort connector
• One VGA monitor connector
• One Personal System/2 (PS/2) keyboard connector (optional)
• One PS/2 mouse connector (optional)
• Three audio connectors on the rear panel (audio line-in connector, audio line-out connector, and
microphone connector)
• Two audio connectors on the front panel (microphone connector and headphone connector)
For more information, see "Locating connectors, controls, and indicators on the front of your computer" on
page 8 and "Locating connectors on the rear of your computer" on page 9.
Expansion
• One hard disk drive bay
• One optical drive bay
• One PCI Express x1 card slot
• One PCI Express x16 graphics card slot
• Two PCI card slots
Power supply
Your computer comes with a 240-watt automatic voltage-sensing power supply.
Security features
• Computrace Agent software embedded in firmware
• Cover presence switch (also called intrusion switch)
• Ability to enable or disable a device
• Ability to enable and disable USB connectors individually
• Keyboard with fingerprint reader (shipped with some models)
• Power-on password (POP), administrator password, and hard disk drive password to deter unauthorized
use of your computer
• Startup sequence control
• Startup without keyboard or mouse
• Support for an integrated cable lock (Kensington lock)
• Support for a padlock
• Trusted Platform Module (TPM)
For more information, see Chapter 4 "Security" on page 27.
Preinstalled software programs
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Chapter 1 Product overview
3