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Mac Pro - can I use 800mhz ram on 667mhz system?


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Quick question:


I have a 2006 Pro with 667Mhz 5300 memory. Can I successfully use 800Mhz 6400 memory on it? Will it just run at the 667Mhz speed if I whack it in? It will be the only memory in my system so won't be mixed with any other sticks of 667Mhz speed.


Any ideas?

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