http://www.hardware.fr/articles/940-1/intel-core-i7-6700k-i5-6600k-z170-skylake-test.html
Crysis 3 settings : 1920*1080 Very High,
sans anti-aliasing.
ARMA III settings : 1920*1080 Ultra,
sans anti-aliasing.
x-plane 10 settings : 1920*1080
sans anti-aliasing.
F1 2013 settings : 1920*1080
sans anti-aliasing.
Watch Dogs settings : 1920 * 1080 with a level of overall quality Ultra
without anti-aliasing.
Total War Rome II Settings : 1920 * 1080 Extreme but by
disabling the AA and SSAO.
Company Of Heroes II Settings : 1920 * 1080 maximum quality made
exception of anti-aliasing.
Anno 2070 settings : 1920 * 1080 with very high settings and still
no anti-aliasing.
That is not how you going to play with your GTX980, the difference from 4790K vs 6700K at default is negligible.