Lenovo’s IdeaPad Yoga 13 has been one of the most popular Windows 8 machines, combining an ultrabook’s design and specs with a rotating, back-bending touchscreen. But the smaller Yoga 11 was underpowered by comparison, running Windows RT on an ARM processor. As of today, though, Lenovo is rolling out an alternative: the Yoga 11S, which replaces the 11’s Tegra chip with an Intel one and runs Windows 8. Lenovo has started accepting orders for the 11S on its site, and they’ll soon be available online at Best Buy. The base model costs $ 799.99 — about $ 250 more than the current price of its RT counterpart — and comes with an 11.6-inch 1366 x 768 display, 4GB of memory, a 128GB SSD, and a Core i3 processor, upgradeable to a Core i5 or i7….