When I built my first computer, I powered on after I installed the processor.. to make sure that the fan and processor were functional.. Then I powered up again after the graphics card and RAM were installed.. Finally, I did one more check with all the hardware before I actually started to format and partition my hard drive. Now, I install everything at once, without powering on.. b/c most motherboards are very powerful, and can take it..
As for the hd that you are currently using.. it may have some compatibility issues with your new system. It just depends on how different the motherboards are... You will know right when you install the hd if you will have to reformat it or not.. The hd would not be able to boot to the os, and would instead give you a blue screen of death.. If the hd boots the OS properly, then Great! You have no issues.
Hope this helps some..
joshSCH
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The system should boot using the old harddrive. It may not recognize many things anymore (resolution reverts to 800x600, that sorta thing), but it should still boot up.
Not necessarily.. I just had a problem a few weeks ago where my hd could not recognize the new chipset when I installed it in a different build..
joshSCH
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The OS will often not recognize the hardware. Installers will come with a ton of drivers ready to load, and then install the ones appropriate for your system. When you then take your install and put it on new hardware, sometimes you'll need a newer driver for something. Probably better to just reinstall at that point...
Infarction
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