1gb ram on the 560ti. It doesn't affect my gaming was just concerned there was an underlying problem, thanks for the help. Whenever i quit source i get greeted with a message saying the source engine is not working shut it down blah blah so maybe it is software related.
Right click on CSS in Source, then go to Local Files and have it Verify the cache. Might fix that issue.
As for that fixing the performance, as I said before nVidia cards tend to get performance drops with some patches. Have seen people with GTX580s getting less FPS than my HD5870 which is not as powerful.