> you are using a 4 Core CPU , with Multithreading , so it has 8 Virtual cores
> 16% means that you are using 1 Core to the maxmimum
>
> Try running several Queries from different connections on classic server
> then you will use more cores
>
> Super Classic will Use 1 Core per Database , so that is all you get for your setup

Per Connection not per database.

> Super Classic will only benefit you if you have several Databases

You mean SuperServer here.

Check out my FB 2.5 architecture comparison sheet:
http://www.firebirdsql.org/file/fb25_architecture_comparison.pdf


--
With regards,
Thomas Steinmaurer
http://www.upscene.com/

Professional Tools and Services for Firebird
FB TraceManager, IB LogManager, Database Health Check, Tuning etc.