Starting to get into larger assemblies and the PC is having some issues keeping up.

What is weird is that I can rotate the entire model just fine, but then some times, it just freezes up for 1-2 seconds, then gets back to smooth movement.

Under heavy CPU shows ~40% usage, GPU load only about ~15-20%, GPU memory controller load 15%

Not sure why more of the GPU is not being utilized.

Curious what you think the bottleneck is in the PC setup (older PC that has been upgraded):

Windows 7 64bit

i7-3770 (3.4GHz)

32GB DDR3 PC3-12800

Nvidia Quadroo P1000

1TB SSD