qqp question1: "What does ""1.7 GHz with Turbo Boost up to 2.7 GHz"" mean, and what is turbo boost? Is this processor sufficient for high-end performance?" question2: How does the 2.7 GHz dual-core Intel Core i5, Turbo Boost up to 3.1 GHz compare to the 3.1 GHz dual-core Intel Core i7, Turbo Boost up to 3.4 GHz?