So I have this really nice laptop that has decent specs. (Lenovo flex 2 15in) There are many types of this laptop one with core i5, i7, and the one that I have is i3. I am wondering if you can upgrade it... or is the CPU integrated? The reason why is its i3 and clocks and only 1.9 GHZ with dual core. Im trying to push it to quad core with atleast 2 ~ 3 GHZ. Any suggestions?