672 is a little low by today's standard, but should be ok for running even huge projects in the editor. So that's not the reason for your problem.

Does the problem only occur with WED, but not with MED or when starting the car demo with SED?

Can you describe the exact steps for causing a crash on your PC, starting with an empty project in WED, and the error message that you get? Is the crash reproducible or does it occur random?

Which resident software is running on your PC and which video card are you using?