that is fine
weird thing is with my specs above im bottle necked by my GPU in most things, but you have a very good gpu and apart from your CPU our systems are very similar but giving very different results
Very interesting thread and wanted to share my specs not to brag but because OP has much better GPU (i know MC is CPU based)
between 220-240 fps on my pc (can hit 300+ when in the same area for awhile)
i7 3770k OC @4.6GHz
16Gb Ram DDR3 1866
GTX 550 ti EVGA SC
60gb M4 SSD
IMO the OP PC should be running 100+ FPS easy