Be aware: only the T series without the ‘s’, e.g.: T450 (has 2 dimm slots) but not T450s (smaller, has 1 dimm slot + 1 soldered module) 4= display size (14’)

Be aware: only the T series without the ‘s’, e.g.: T450 (has 2 dimm slots) but not T450s (smaller, has 1 dimm slot + 1 soldered module) 4= display size (14’) 5= cpu generation (here: Broadwell) So an equivalent to the new XPS would be a T480 T480s Thunderbolt is only available from T470 onwards (not in the x270) The Reddit ThinkPad forum is your friend here.