I am building a gaming computer and will only be able to get a r9 380x, but if I wait a few months, then I can get a 1070. I will be using an i5-6600k with Intel HD 530 graphics. What games will I be able to run with 50ish fps in lowest settings?
I run GTA V, ETS2, ATS and World of Warships @~60fps 1080p with my iGPU, GTA V, ETS2 and ATS I have to use low settings , with World of Warships, I can play with surprisingly high settings, you will want more though.
Bear in mind that the iGPU on my 4790k is slightly worse that the iGPU on your Skylake.