What PC to buy?

This is the computer that I bought

HP SB Workstation Z440 Xeon E5 - 1650 256 GB SSD 8 GB RAM DVD SuperMulti

Also customized it and added these

1 - Crucial - DDR4 - 8 GB - DIMM 288-pin - upgrading my RAM to 16 GB
1 - NVIDIA Quadro K2200 Graphics Card - 4 GB RAM

The computer was bought with the thought that we met the requirements to run Sketchup. It’s brand new and there are no other programs except MS Office and Sketcup. I’ve done all the windows updates as well us updated NVIDIA graphic drivers.

Our computer is just using Sketchup Viewer to navigate around sketchup files sent to us by our clients. We are a homebuilding company so most of our files are huge with a lot of layers. Files range from 100 MB - 400 MB. When I open a sketchup file, it will load properly but then it will freeze on me.

Is there something that I need to do to fix this or is my system not sufficient enough to handle this big file?

Please advise.