The three new models will consist of five different sizes total ranging from 11-inch screens up to 15-inch options for availability beginning this June to July.
http://www.notebookcheck.net/Lenovo-unveils-Yoga-710-Yoga-510-and-Miix-310-mainstream-convertibles.159855.0.html
Hi,
Are you are sure that Yoga 510-15 have IPS screen with 250nits?
From the YouTube reviews of the Yoga 510-15, seen that the screen is TN and with low brightness about 200nits.