AutoCAD Architecture :: 64 Stall When Saving Automatically Or Manually?

I have had this complaint for a while internally however whenever Autocad Architecture saves while using a fully functional 3d architure model it hangs when it saves.

There are no errors discovered via audit, the file has been purged, the file has annotative scaled items, there are 3 x-refs & we are working off the server.The file generally has a low amount of layers and the xreferences have also been audited and purged.

in the base file - When Autocad Saves automatically or manually I get a 30 second delay. The task manager only shows one core on the I5 being used more than the others (not fully but spikes up and down). However when I want to go crazy and save multiple times the other cores pick up accordingly (obviously). Cpu usage only shows 27% usage at it s peak (overall).

The amount of ram used remains unchanged in both scenarios.

The network indicates 3-12% usage.

In the xref of the base file (generally the sheet file which has only the base file (with all the attached xreferences) and a title block with a low res image - The model craps out for 2 minutes while it saves same task manager results as well.

I have clean xreferences with no looping which the base file houses.

I'm trying to elimitnate or upgrade (computer) whatever is the issue.

note this has also occured with standard linework files (versus using 3d autcad architure elements)

Computer specs

Intel I5 760 @2.8ghz
16gb ram
64 bit OS win7 pro
Quadro FX 580 with dual screen