GA-MA78GM-S2H MB hangs Sometimes After Adding New SATA Drive

[i_am_jim]

I had a small IDE C: drive and was getting too close to the edge so I upgraded to a larger SATA 6 drive.  Since then the machine sometimes hangs at the very beginning of boot.  I can turn power off and reboot again and it usually boots OK.  

Any guesses why?

[i_am_jim]

I'm adding this screen shot of where it hangs in case this helps.

[bofh1971]

Hi I am Jim

How big is the new drive?
are your sata ports enabled in the bios? do you have the latest bios?

*** edit ***
just noticed you said sometimes.

Does the machine hang more when rebooting but boots better from a cold boot?
If so then thats most likely the old power supply problem.  I had a fairly good OCZ (or so I thought) do exactly this as it failed to deliver enough juice to the 12v mainboard connector.