The main issue with the Yoga Book’s performance is that the Intel Atom processor is not really fast enough to run Windows 10 applications that you’d normally use on a laptop or desktop. In either case there is a good smattering of bands for cellular connectivity on the go. As for 4G LTE support, the Yoga Book is split into two models: one that supports most EMEA regions, while the other supports the Americas. The Yoga Book also supports Wi-Fi 802.11a/b/g/n/ac on 2.4 and 5.0 GHz bands thanks to a Broadcom chip, plus Bluetooth 4.0 support. While Cherry Trail processors do support USB 3.0, we’re not getting it on the Yoga Book due to the choice of a micro-USB port.

This processor only supports dual-channel LPDDR3 memory, so we’re limited to 25.6 GB/s of bandwidth, and the Yoga Book tops out at 4 GB of RAM. The x5-Z8550 is clocked at 1.44 GHz with a burst frequency of 2.40 GHz, while the Intel HD Graphics 400 GPU inside is clocked up to 600 MHz. This is essentially Intel’s competitor to tablet processors from ARM vendors, although, of course, the entire Atom catalogue supports x86 instructions.

Built using a 14nm process, the Z8550 features four Airmont CPU cores and four threads, 2 MB of L2 cache, and a “scenario design power” of 2W. The Lenovo Yoga Book’s main source of performance is the Intel Atom x5-Z8550, which is an entry-level SoC from the company’s Cherry Trail line.

Intel atom x5 z8550