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T450: difference between docks 40A1 and 40A2?

T430 and later, plus T530 and later series specific matters only
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ggherdov
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Location: Prague, Czechia

T450: difference between docks 40A1 and 40A2?

#1 Post by ggherdov » Mon Feb 24, 2020 9:23 am

Hello,

I have a T450 and I'm looking for a docking station. I'm having troubles finding the part number of docks compatible with my laptop.
On the Lenovo website I found two items that seems to be compatible, and they're named 40A1 and 40A2:

https://accessorysmartfind.lenovo.com/# ... 40A20090US
https://accessorysmartfind.lenovo.com/# ... 40A10090US

The pages above are not for the european region (where I live), but I am interested in the part numbers so that I can search for second hand docks.

Questions: are the 40A1 and 40A2 both compatible with the T450? What are the differences between the two?

Searching this forum I found hints that the part numbers 40A0, 40A1 and 40A2 correspond to docks named "basic", "pro" and "ultra" but again I can't find information about the differences between these and I'd appreciate some clarifications.

Thanks!

dr_st
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Re: T450: difference between docks 40A1 and 40A2?

#2 Post by dr_st » Mon Feb 24, 2020 2:24 pm

The Pro Dock (40A1) can only support a single digital display out (DP or DVI). The Ultra Dock (40A2) supports dual digital display out (DP/DVI + DP/HDMI). That's the only difference as far as I know.
Thinkpad 25 (20K7), X1 Carbon (20HQ), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad, A21m 2628-GXU

ggherdov
Posts: 2
Joined: Mon Feb 24, 2020 9:08 am
Location: Prague, Czechia

Re: T450: difference between docks 40A1 and 40A2?

#3 Post by ggherdov » Mon Feb 24, 2020 4:58 pm

Good to know! Thank you for your answer.

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