The Yoga Book 9i's performance in our testing lab backs up my experience. Performance testing results Header Cell - Column 0 I used the Yoga Book 9i as my primary work computer for a number of days and it had no issues handling my average workflow - which usually involves well over 20 open browser tabs, Slack and the occasional YouTube video. These specs are sufficient enough for work and everyday computing. The Yoga Book 9i packs a 13th Gen Intel Core i7-1355U mobile CPU, 16GB of RAM and 512GB of SSD storage. Whether it’s music or videos, your ears won’t be disappointed by the Yoga Book 9i’s speaker quality. Every element came through clearly, especially guitarist Gus G’s solos. Firewind’s “Welcome to the Empire” is a raucous song, with a barrage of guitar solos, soaring vocals and double bass drums. Not only did everything come through clearly, there was also plenty of bass to make everything sound punchier. The aforementioned Transformers trailer, with its non-stop barrage of explosions, shouting and metal smashing on metal sounded great. The Dolby Atmos-optimized speakers deliver impressive sound for a laptop. This includes two 2-watt tweets in the soundbar and two 2-watt woofers on the bottom corners. The Yoga Book 9i features Bowers & Wilkins speakers within its hinge. But so long as you work inside a cafe or restaurant, you’ll be fine. That’s a shame since the Yoga Book 9i would otherwise be an ideal way to enjoy dual-screen functionality outdoors. This is doubly true for the virtual keyboard, which became all but invisible under sunlight. Under direct sunlight, the displays became difficult to see. The Yoga Book 9i is bright enough when working indoors but I found it too dim for outdoor use. As you can see in the chart above, that’s better than its competitors. Color accuracy is great, with both screens scoring 0.07 in the Delta-E (where 0 is perfect). That’s dimmer than both the Yoga 9i Gen 8 (353 nits) and Galaxy Book 3 Pro 360 (380 nits). We also found that the top display achieved an average of 335 nits of brightness while the bottom screen achieved 343 nits. This is especially true since you can orient the laptop for horizontal and vertical content. If you’re like me and find yourself constrained by a standard laptop’s single screen, the Yoga Book 9i’s dual screens will be a game-changer. The dual-screen functionality is the Yoga Book 9i’s main selling point and it functions as advertised. Thankfully, you can easily wipe any fingerprints off with a soft tissue. Fingerprints aren’t too noticeable indoors but become apparent under direct sunlight. The same is true when I used the included stylus. The touchscreen display never failed to register taps and swipes when I used my fingers. You can easily switch between the two modes by turning the laptop to the appropriate orientation. The former is ideal for activities like videos and web conferencing, while the latter works well for things like word processors, coding or web browsing. The Yoga Book 9i has two primary viewing modes: Dual landscape and dual portrait. The included folio stand allows for dual-screen productivity. The trailer contains a lot of fast-moving action and quick cuts, but the displays’ 60hz refresh rate ensured everything moved along smoothly. When watching the latest trailer for Transformers: Rise of the Beasts, I was impressed by the vivid colors and sharp contrast between dark and lighter elements.
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