You're actually getting lower fps than i am, and your cpu should be faster than mine even though mine is clocked a bit higher (its 3 generations older, first gen i7)

Can you install MSI Afterburner, and configure it to show the onscreen display for items such as the GPU Clockrate, memory clockrate and usage?

theres a video tutorial on doing so at https://www.youtube.com/watch?v=xeUSkaZ4_t0