Lenovo ThinkPad X1 Extreme detailed with discrete graphics - SlashGear
The ThinkPad E490 with the Radeon GPU is much faster, but also gets very hot - NotebookCheck.net News
ThinkPad X1 Extreme Gen 2: NVIDIA confirms that Lenovo's multimedia laptop has a GeForce GTX 1650 Max-Q, not a regular GTX 1650 - NotebookCheck.net News
Lenovo ThinkPad X1 Extreme 2021 just got Nvidia RTX 3080 and Intel Tiger Lake refresh | Tom's Guide
The complete list of laptops with Nvidia GTX 1070 and GTX 1080 graphics
Lenovo announces new external GPU to power up your Ultrabook's graphics - MSPoweruser