overclock C2D

I need some help with my overclock:
CPU and RAM Specs here: paste bin (dot) com /6sv26ZYW and my mobo is a P5KPL/1600 LGA 775
I can only reach 250 FSB and I read that my E4300 with DDR2-667 can reach up to 333 FSB almost without any voltage change. If I put 251+ FSB the PC won't boot and it reset BIOS to default settings.
Currently my CPU, RAM and MOBO have stock voltage. Any thoughts?

see the response in /tech/

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