I am Using Ghost Script to convert PS to PDF files.

On my I3 machine having 4 GB 1333 FSB RAM and 7200 RPM HDD I could convert 100 Files in 25 Seconds.

I have now bought I7 4770 k processor with 16 GB 1600 FSB RAM with SSD Drive and Intel Most Recomended Mother board For the processor.
But the performance is not much significant.

In my I3 CPU Usage Graph reached up to 70-75 % but in I7 I see it only around 15-20 % which means that my CPU is not working to its optimization.

What should I do to get the best optimization. How to check whether my RAM,SSD/HDD,Mother Board are running to their optimization or not ?

How could I make my machine work fast for my above conversion task
regards