Review: Lenovo's ThinkPad X1 Extreme Gen 4 is a powerful laptop with heat problems | Ars Technica
ThinkPad X1 Extreme Gen 4 Intel (16”) - Black Weave | Lenovo US
ThinkPad X1 Extreme review: Big on power and price | Engadget
Lenovo ThinkPad X1 Extreme 2019 Laptop Review: The second generation of Lenovo's premier multimedia laptop has gotten worse - NotebookCheck.net Reviews
Lenovo slides Nvidia graphics into 4K prosumer laptop
Lenovo ThinkPad X1 Extreme (Gen 3) review: 4G LTE and performance hardware upgrades improve a solid foundation | Windows Central