You should know that scores with physx eneable will not be aknowledged by fellow oc'ers...
Its not fairplay, to put it simply. You should always benchmark with physx disabled. I know it sounds weird but thats the way it is.
And to improve the score you should do the basic tweaks:
-classic theme in windows with black background
-performance options set in ccc, all of them, ai catalyst disabled
-set manually real time affinity on vantage
close any programs and processes that are not needed
etc etc
le: and also, you should always open cpu-z and gpu-z and make the screenshot of your score with those 2 in it.