I'm also experiencing slowness on my station. I did a test with a colleague for whom everything seems to work perfectly. We have the same computer, hardware and all. We each opened the same file and she add a quick open of 15 seconds while for me it took more than 3 minutes. What settings could be affecting the time it takes to open a file from PDM?
A small tip , not sure:
The PDM addin for solidworks may not be properly installed.May be you can try reinstalling solidworks and PDM client.
Many issues I had where resolved by our VAR by resetting my personnal settings options to factory default.