SketchUp performance issues

hey everybody,

I was wondering if enyone could help me out with some problems ive been having while using sketchup Pro. To start of with im fairly new to sketchup but lately ive have started making 3d models of technical rooms for work. They told me to assemble a pc with the correct parts to make a good modeling pc.In the past the company has bought several latops from msi and alienware but none seemed to be up for the task. After some research i assembled the following pc at Dell:

Processor: Intel® Core™ i9-9980XE 3,0 GHz, 4,5 GHz Turbo, 18C 24,75 MB cache, HT, (165 W) DDR4-2666 Non-ECC
OS: Windows 10 Pro 64-bits Engels, Nederlands, Frans, Duits, Italiaans
GPU:Nvidia Quadro RTX4000, 8 GB, 3DP, VirtualLink (XX20T)
Memory: 64 GB 4 x 16 GB DDR4 2666 MHz UDIMM Non-ECC
SSD:Internal NVMe PCIe SSD (Dell Ultra-Speed-disc)

After now using this setup for about 2 weeks ive noticed when i import complex models and paste them into my overall drawing that at some point when your moving (with 3Dconnexion spacemouse) around and come close to the models, the pc starts to lag and stutter till i pass the object. Or when autosave kickes in and stops my pc from working for about 2min. Considdering the specs on this pc i would think that id be able to run this program without eny issues.

Ive put of shades, lowered my anti aliasing settings,… and several other possible settings however none seem to work.

Eny possible input would be greatly appreciated!