AMD 780 to 970 chipset motherboard: Do I need to reformat my hard drive?

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I am upgrading my PC to an AMD FX 8350 and an AMD 970 chipset motherboard (previously an AMD 780 chipset w/ Phenom II X4). Do I need to reformat my hard drive? I know if I was going AMD to Intel this would go without saying, but if its AMD to AMD, does it matter?