Is it possible to upgrade alienware CPU

Is it possible to upgrade alienware CPU

i have an alienware 17 r4 from 2017 and it has an i7 7700hq and i was wondering if i could upgrade the CPU to one that is in the new alienware 17 r4 like the i7-8750H or i9-8950HK, i know it would involve soldering but all i need to know if either of those CPU's are compatible with the mobo in my alienware.