What’s the official line on what counts as “slim” in a laptop these days? Lenovo’s Slim Pro 9i may be the company’s most powerful consumer laptop, but it’s certainly not its thinnest. At 25 mm thick and weighing just shy of 4 pounds, it’s downright fat in comparison to anything I’d consider truly slim on the market today.

But let’s not judge this (note)book by its misguided branding. This machine is explicitly focused on performance and power, so I threw everything I had against it to see how it handles the strain.

Let’s begin with a tour of the hardware. The gray slab is unique in two features. The most immediately evident is a wide tab, about 4 inches long, that juts out from the top of the laptop, above the screen. This tab is helpful for opening the laptop, and it also provides a spot for the 5-megapixel webcam and infrared presence sensor to reside without crowding the top of the screen. While that feature is mostly decorative, the other main design feature can be found by flipping the laptop over. Here you’ll find a huge vent that runs the entire length of the chassis, jetting hot exhaust out the back of the device when it’s under load. Given the beefy specs of the laptop, that may be often—and the fan was running quite a bit during my testing.

Core components include a 2.4-GHz Intel Core i7-13705H processor (13th generation), 32 GB of RAM, a 1-TB SSD, and an Nvidia GeForce RTX 4050 graphics card. None of those specs are earth-shattering, but all are definitively on the high end for any portable laptop, particularly one not specifically targeting gamers.