ThinkPad Advanced Dock
with the conductive rubber caps
- 42W4628 (42W4629)
without the conductive rubber caps
- 26R9061 (26R9060)
This docking station is capable of accepting an 'extender' (FRU: 42W3365/42X4884) that seems to be meant for supported 14.1-inch widescreen models. The purpose of this extender is to function as a wrist-rest/palm-rest, as the 14.1-inch widescreen models do not have sufficient coverage to act as a wrist-rest/palm-rest.
PCI-Express Express slot
While the Advanced Dock MT 2503 physically has a PCIe x16 slot, it is not capable of x16 operation. This is due to a bandwidth limitation on the ThinkPad's docking port, as it does not provide the full 16 lanes needed for x16 speeds. Due to this limitation, the PCIe x16 slot provides only 1 lane (x1 speed) to the attached PCIe card.
Please note that the PCIe x16 slot does not accept dual or triple-slot full-length PCIe cards, as it does not have the space required to house them. Because of this, only single-slot half-length cards will work. For example, a GeForce GT 1030 with a single-slot height heatsink will fit. Other cards, such as this particular GeForce GTX 1650 will not fit. If such a card is needed to be used in this dock, you must use a PCIe riser or an extension cable.