DDR2 800mhz 6400 Ram in older macbook?

Hi,
I have a 2.0Ghz Macbook that takes DDR2 667mhz 5300 ram, my question is can i use DDR2 800mhz 6400 Ram? I have two PNY modules lying around and seems a shame to waste them!

It's possible the modules may work but not at 800 MHz, but more than likely they won't work. You can always try them to find out.

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