The i7-6700HQ is a pretty "heavy CPU". I do not think you find one that is paired with anything less than the GTX 960m. There are i7-6700HQ laptop that relies on the integrated Intel HD graphics core, but game performance will be extremely bad compared to the GTX 960m.
Also, the primary difference between the quad core i5 and i7 CPUs other than a little higher clock speed is Hyper Threading (HT). If the programs you use do not take advantage of HT, then you will not gain much benefits with a quad core i7 other the slightly higher clock speed.