I have a Msi Gl72 6qf laptop.
proccesor= Intel(r) core(tm) i7-6700HQ CPU @ 2.60GHZ 2.59 GHz
Graphics card Nvidea GTX 960m
My fps goes form 40 to 60
Proccesor usage always 100 when playing csgo.
Make sure you don't have anything in the background eating up your CPU usage. Do a clean install of your geforce driver which can be downloaded from here. http://www.geforce.com/drivers
If you have v-sync enabled you'll limit your FPS to 60, without it you'll get well above it but suffer from screen tearing.