OK, thanks all for testing this. The software is optimized for multicore but the algorithm is not that complex and may not reveal 100% accurate the differences between different CPU's.
Having this experience and this goal, I developed a new benchmark, witch use a far more complex multithreaded algorithm.
Multi Core PI.
The old benchmark Multi Core Prime is no longer in development. I hope you will find this benchmark more useful and will reveal more accurate performance differences between platforms.
Multi Core PI calculates PI decimals using Bailey–Borwein–Plouffe formula. The benchmark is using a multithreaded algorithm written in C++ and provide excellent parallelism. Multi Core PI is written in Visual C++ using MFC and Win32API.
How it works
A slider will help you set the decimals of PI, from 10.000 to 100.000. Default is 80.000. Just hit Run benchmark button to start benching your CPU.
Submit to HWBOT
First, press Take Screenshot button. A screenshot and a XML datafile will be created. Attentio! CPUZ must be running!
Second, follow the link provided on the dialog and submit your datafile to HWBOT.
Supported operating systems
Microsoft Windows XP / Server 2003
Microsoft Windows Vista / 7
Microsoft Windows 8 / Server 2012
His own thread
http://www.techpowerup.com/forums/showthread.php?p=2841926#post2841926
Download link
http://www.pcgamingxtreme.ro/