CPU issues despite measures taken to correct it.

My CPU is overloading in FL studio 11 and I'm honestly not sure why. Even when I have no VSTs or instruments playing my CPU will reaching about 95. When I play the song, sometimes there will be no issues whereas other times I will hear clipping. I made sure I switched my driver to ASIO, and changed the buffer rate to around 750. I also ensured that I don't have any other programs open that may eat up my CPU, but it's still fucking up.

I am only running 3 VSTs (2 Nexus and Sylenth 1) and usually I can run Serum, nexus, and other plugins all at once w/o a problem. My CPU specs are Intel Core i7-4700MQ at 2.4 GHz. I'm beginning to think it may be a VST issue and not actually one with my CPU, but I would appreciate some feedback nonetheless.

Thank you