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Dynabook Portege X40-K : Page 2 of 2

The business notebook’s build quality, speed, storage, and keyboard earn high marks, but the display and webcam less so. By Matt Whitlock

Keyboard and Touch Pad

Figure 4

On the input side, there’s a lot to like about the X40-K’s black, six-row keyboard and touchpad (Figure 4). The flat keys are well spaced and offer just enough resistance to give that tactile impression and slightly more key travel than the typical low-profile chiclet board. It’s not going to win any typing comparisons against something like Lenovo’s ThinkPad X1 Carbon, but I preferred it to the shallow keys of my Lenovo ThinkBook.

The Synaptic touchpad isn’t miles apart from other notebooks in this class. At 10x7 cm it’s big enough to be useful, and well positioned in the middle so your palms naturally rest on either side when typing. Dynabook is bucking the trend of integrating the fingerprint reader with the power key, instead embedding it in the top-left corner of the touchpad. The reader performed well, quickly recognizing my finger from a variety of angles.

Performance and Battery Life

Intel’s done a great job with its 12th Generation Core processors on the performance front, and Dynabook is leveraging the Core i7-1260P to great effect. Running Windows 11 Pro, it scored an average of 5,533 in PC Mark 10 while on AC in performance mode with all eco-saving features disabled. Most other benchmarks came in near the same and in some cases higher than products running the same CPU. Graphics takes a slight performance hit due to the single 16GB RAM stick in my review unit.

Synthetic benchmarks aside, the X40-K felt snappy and responsive while performing real-world productivity work, in my case a large variety of Office applications, heavy web browsing, some consoles, and digital media work. The 12th Gen integrated graphics kept up surprisingly well in heavier applications like Premiere Pro and After Effects, however those doing more intensive media workloads should opt for discrete graphics.

The integrated 53W/h battery charged from dead to full in about an hour and 45 minutes with the included 65W charger. I averaged between eight to nine hours on a full charge with my screen at 75% brightness, but those doing typical productivity work should expect a little more than nine hours of real-world use. It managed 13.5 hours in my video rundown test, where I loop an HD movie at 50% screen brightness until it turns itself off.

Final Thoughts

For a premium business notebook (with a semi-premium price tag), the X40-K is hit or miss. The mediocre 14-inch display and low-quality 720p webcam are disappointing, while the build quality, speed, storage, and keyboard earn high marks. The dark-blue color, though not my personal cup of tea, is distinctive and would be attractive to many. The bottom cover is easily removeable, a plus for channel pros looking to upgrade components or replace batteries on their own, and the included three-year warranty adds significant value to the purchase price. I can’t say for sure that’s enough to win over resellers, but it’s worth a look.

Opening image and Figures 1 and 3 courtesy of Dynabook

About the Author

Matt Whitlock's picture

Matt Whitlock is online director and technical editor for

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