The Asus S400CA has an Intel Core i3-2xxx processor family which is better than most laptops of a similar type and age to it. Most ultrabooks that were released more than two years ago have an Intel Core i5 processor family.
An Intel Core i3-2xxx processor family is in fact the worst processor family across all portable PCs of a similar age and spec to the S400CA.
The best processor family across similar types of portable PC is Intel Core i7-3xxx.
Notebook PCs with a better processor family that might also be worth considering include the Samsung 540U3C (Intel Core i3-3xxx).