Overclocking Pentium 4 540 - no change?!

[trodas]

Since my Super Pi 1M results on 3.2GHz Pentium 4 540 are somewhat disappointing 45.172 - 44.157sec:

...

 

So then I tried to overclock it a little. It is 200x16 = 3200MHz by default. The only one CPU tweak the MSI PM8M3-V mobo offer is the - after I unclocked it in the bios - FSB. 210MHz FSB post, yet failed to boot into Windows 2000 SP4, claiming that ACPI fail. Lol. 208MHz worked, booted and run SuperPi and CPU-Z validations:

http://valid.canardpc.com/uv65p3

http://valid.canardpc.com/37epge

 

So, a 3328MHz compared to 3200MHz = I hoped to gain something. But the SuperPi result was disapointingly low - 44.078sec...!!!

 

So, all the overclocking get me from 44.157sec to 44.078sec

I know that this is just a little 104% overclock, but 4% from 44.157sec is 1,76628 sec - and that I hoped to gain. Instead I gained 0,079 sec.

 

1,76628

0,079

 

Hmmm. This is disproportional. Anyone can explain me this, or WTF is going on?!

[Moose83]

Maybee Chip is getting too hot;)

[trodas]

That is why I cool it pretty well:

 

 

And so far, it never even touched 50°C... so it should not be of excessive heat. Tough this seems as the best logical explaination...