Overclock a G45/G43 Express Chipset

Nov 3, 2014
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HI

May i ask, Is it possible to overclock my dell inspiron 560 that has a board of PCI-e Gen. 2 g45/g43 express chipset? then i have the processor Intel core 2 quad Q8300 and it runs Windows 7 32 bit.. And also but i don't know why, my board supports 64 bit and every time i will re install a clean 64 bit windows 7 my PC suddenly Restarts.. may i know what is the possibilities why it is restarting after loading files and appearing the "Starting windows" with the logo..
My PSU is 300 watts i am wondering if it affects the power

thanks!