Alienware 17 (Mid 2013) compatible CPU upgrades

I have an alienware 17 laptop that I bought in mid 2013.  I have been learning more about computers and comparing my laptop to other laptop models (including the newest alienware 17) and I have come to realize that my CPU is what is truly holding back performance on my laptop.  I currently have and Intel Core i7-4700MQ CPU @2.4GHZ that is single core.  I want to upgrade to a dual or even a quad core processor.  At the same time, I don't want to get something that isn't supported by dell or might mess up something in my computer.  Does anybody know what CPU's are compatible with my computer?

On another note, can someone please tell me if there is a more official name than the alienware 17.  Whenever I try to search for compatible parts it comes up with m17x, m17x r2 m17x r3 or m17x r4 but not alienware 17 and I don't know which one the mid 2013 version is if it is any of them.