Will my I5 4690k bottleneck 970 SLI? in many games my cpu runs at like 90-100 %

i have tried to overclock the cpu. but i still get the high percentage. especially in BF4 and assasins creed unity. when i reach the 100 % i get some annoying stuttering. im kinda new with the SLI setup.
 
The processor should be running at 99% anyway, that is the "optimal" usage (In theory). You are getting the most out of the CPU without maxing it.
That being said, bottlenecks occur when the CPU is at max, and the cards are not.
100% CPU and 40-50% GPU is a bottleneck.
 


The recommended CPU for that game is a Core i7-3770.

You have a minimum spec CPU.

You can blame Ubisoft for the insane recommended system requirements. They even claim that the game is CPU bound.