Question why my cpu pentium dual core e5500 fine clock not working?

Apr 28, 2019
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i was overclocking my cpu and i had an option to increase multiplier to 14.5 and it was not working i had seen in cpuz but no speed increase...
what is the best option to overclock pentium dual core e5500..
motherboard
ga g41m combo 1.3
 
Apr 28, 2019
3
0
10
if i decrease multiplier to 12 and fsb to 333 it will get to 4ghz will it require more voltage???
i had overclock to 3.30ghz at multiplier to 14 and fsb to 236 but increase more window crashes..i didnt increase core voltage a bit..