I have been working on a large assembly lately which has been working perfectly until I added a heap of new parts to it. Now it is very slow to do any task, even moving the mouse around stutters. Suppressing all of the parts until I find the one causing the slow down will be a bit tedious and I was wondering if there is a way to show what is being processed in real time so I can identify which parts are consuming most of the CPU and slowing it all down?

The assembly file is too big to upload on here so I've put it in a Dropbox link below. Any help would be appreciated.

Dropbox - Fatigue Testing Assembly

EDIT: I may have found what is causing it. My computer tells me my GPU is barely being used (Quadro P4200). Is there a way to force Solidworks to use it?