To Andreas Have you tried to change

To Andreas

Have you tried to change multiplier to increase the CPU frequency?
Does this point of BIOS Setup menu exist?
Have you tried to find a newer BIOS for your motherboard on a manufacturer site and
use it?

Added later

OK, I opened your bin-file with MODBIN, the point I've ascked doesn't exist
in this version of BIOS. So, there are three ways:
1)Find a newer BIOS.
2)Use FSB=150MHz.
3)If it's possible change multiplier manually with shortcuts on processor
body.