So what are the differences between the Series 3 docking station/port replicator option?
1. Series 3 Ultrabase
The series 3 ultrabase is used on the X220(i), X220t, X230 and X230t.
Features:
- Serial Ultrabay Slim (9.5 mm) – 6 Gbps/SATAIII
- VGA monitor
- Displayport
- Headphone Jack
- Microphone Jack
- 4 x USB 2.0
- Key locking mechanism
- Kensington lock mechanism
- DC power jack
- External ON/OFF switch
2. ThinkPad Mini Port Replicator Series 3 (Product no: 4336-xxx)
- Doesn’t come with power adapter
- Power ON/OFF button
- Kensington lock
- 4 USB 2.0 port (new version has one USB 3.0 in place of USB 2.0)
- VGA
- Gigabit Ethernet passthrough (when in use, the laptop’s ethernet port doesn’t work)
- DC power jack
3. ThinkPad Mini Dock Series 3 (Product number: 4337-xxx)
- 1 x VGA
- 1 x Displayport (displayport is deactivated when DVI port is used)
- Single link DVI-D (even though its a dual link DVI-D)
- Gigabit Ethernet Passthrough (when in use, your laptop’s own gigabit ethernet is disabled)
- 6 USB 2.0 (in the updated model with USB 3.0 port, one of the USB port is USB 3.0)
- DC power jack
- 90 watts adapter
4. ThinkPad Mini Dock Plus Series 3 (i.e. Workstation model) (Product number: 4338-xxx)
- 1 x VGA port
- 2 x Displayport
- 2 x DVI-D single link (when one DVI port is used, the Displayport next to it is disabled)
- Gigabit Ethernet Passthrough (when in use, your laptop’s own gigabit ethernet is disabled)
- 6 USB 2.0
- eSATA (not eSATAp) – new USB 3.0 model has no eSATA port, the eSATA port is replaced with a USB 3.0 port
- DC power jack
- 90 watts adapter (Workstation model comes with 135 watts, latest one comes with 170 watts adapter)