At this year's Mobile World Congress in February,
Lenovo announced the Yoga 730, its mid-range convertible for consumers. The main new feature is that it's refreshed with Intel's new eighth-generation U-series processors, making it quad-core, whereas previous generations were dual-core.
What's interesting is that the CPU in the 15-inch model seems to be a downgrade, from the 7th-gen HQ-series to the 8th-gen U-series. The GPU was bumped up though, from a 2GB Nvidia GeForce GTX 1050 to a 4GB GTX 1050.
Lenovo sent me the 13-inch model, which includes Intel UHD Graphics 620. This means that graphics memory is shared with the system memory. Of course, for such a thin and light machine, integrated graphics are to be expected.